cdcb logo CDCB RESEARCH REPORT
K2-20 (2-22)

State and national standardized lactation averages by breed for cows calving in

H.D. Norman, F.L. Guinan, J.H. Megonigal Jr, and João Dürr
Council on Dairy Cattle Breeding
301-525-2006 ~ duane.norman@uscdcb.com ~ https://uscdcb.com

Lactation yields are often standardized to provide a reasonably equitable comparison of dairy animals having different lactation characteristics (e.g., calving age, days milked, milking frequency, etc.). This annual report provides averages of standardized yield coming from herds enrolled in Dairy Herd Improvement (DHI). The averages are summarized for cows and heifers that calved during for each state and the nation by breed. To assure that nearly all cows calving in 2020 have completed their 305-day lactation and are included, these averages could not be derived before early 2022. The test-day data used by the Council on Dairy Cattle Breeding to calculate the standardized yield are provided by the Dairy Records Processing Centers (DRPC); a report showing DHI participation as of January 1, 2022 has been summarized also using the same data source. Only data used in calculation of national genetic evaluations (see complete evaluation documentation) are included in the state and national averages. Thus, records beyond fifth lactation were excluded, as were those from cows that lacked a first-lactation record or had missing sire identification.

Breed yields differ between this report and the herd-average report. This report summarizes standardized lactation yield (yield adjusted to 305 days, twice daily milking, for month of calving, and to a mature-age basis). In contrast, the herd-average report is determined from actual herd yields. Herd-averages reported are not restricted to records usable for national genetic evaluations. The herd-averages are impacted by lactation length and dry period. Relative yields among breeds differ between the two reports because of large breed differences in the percentage of usable records and age-parity factors. The herd-average report is more current than this standardized yield report and may provide more accurate comparisons of breed productivity.

Lactation records were first calculated with the best prediction method in 1997 and are standardized for age-parity (lactation number), calving month, previous days open, and times milked per day. Records shorter than 305 days are extended to 305 days as part of the best prediction process. Prior to 1997, lactation records were calculated with the test-interval method. The change in methods was responsible for a portion of the yield increases shown between 1990 and 2000 because predicted yield for low-producing cows is higher using best prediction than using the test-interval method. Numbers of records and averages for yields and component percentages are in Tables 1 through 6 by state for Ayrshires, Brown Swiss, Guernseys, Holsteins, Jerseys, and Milking Shorthorns respectively. Component percentages were computed from averages of standardized yields for milk and fat or protein.

Numbers of records and national averages for milk and component yields and component percentages are in Table 7A-F by breed for selected years. Milking Shorthorn was the only breed that had more usable lactations (Table 7A) from 2020 than from 2019. Lactations in the other five breeds decreased by 1.4 to 7.1%. Compared with 2019, milk yield (Table 7B) increased for all six breeds (0.9 to 8.1%). Fat percentage (Table 7C) increased by .04 to.06 for four of the six breeds. Fat yield (Table 7D) in 2020 increased for all breeds, from 8 to 69 pounds. Protein percentage (Table 7E) remained the same or increased up to .09 for all breeds. Average protein yield (Table 7F) showed increases of 5 to 54 lbs for all breeds.

A number of factors affect production averages including milk, beef, and feed prices, government programs, and characteristics of herds entering and leaving eligible testing programs. These average yields over time also reflect changes in management strategies, and the apparent shift of genetic emphasis toward other health and fitness traits. Still, genetic selection continues to have a positive effect on the milk traits. Interpretation of trends in lactation averages should be made in view of all the factors affecting profitability.

DHI Lactation Averages for Ayrshire  
Table 1. Ayrshire State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
Arizona 1 1 18,503 3.45 639 3.19 590
Arkansas 1 1 13,629 3.48 474 3.08 420
California 257 4 28,418 3.68 1047 3.12 887
Colorado 10 3 20,495 3.90 800 3.26 669
Connecticut 78 5 20,069 4.21 845 3.20 643
Delaware 6 2 18,879 4.26 805 3.17 599
Florida 5 1 18,378 3.79 697 3.05 560
Idaho 12 3 18,389 4.50 828 3.37 619
Illinois 207 17 20,707 3.89 805 3.17 656
Indiana 73 13 20,721 4.56 945 3.36 696
Iowa 237 27 20,849 4.00 834 3.20 667
Kansas 5 3 18,398 3.87 712 3.13 575
Kentucky 11 6 18,600 3.91 727 3.16 587
Maine 79 12 18,592 3.93 731 3.12 581
Maryland 191 10 21,706 4.19 910 3.15 683
Massachusetts 17 5 14,395 4.07 586 3.17 457
Michigan 24 13 22,047 3.91 861 3.16 696
Minnesota 277 27 17,981 3.96 712 3.19 573
Mississippi 21 2 16,770 3.93 658 3.36 563
Missouri 28 3 17,232 3.93 678 3.24 558
Nebraska 5 2 22,115 4.21 931 3.40 752
New Hampshire 65 6 17,882 4.05 725 3.29 588
New Mexico 7 2 22,479 3.80 855 3.20 720
New York 507 88 19,326 4.01 776 3.13 605
North Carolina 11 5 16,869 4.06 685 3.29 555
North Dakota 10 1 16,390 4.25 697 3.46 567
Ohio 205 33 18,257 3.89 710 3.21 586
Oklahoma 45 2 20,172 3.67 741 3.14 634
Oregon 10 3 20,868 3.90 814 3.19 665
Pennsylvania 475 81 19,851 4.00 794 3.15 626
Rhode Island 4 2 14,718 3.93 578 3.07 452
Tennessee 5 4 16,640 4.10 682 3.03 504
Texas 16 7 20,496 4.12 844 3.43 704
Utah 6 1 18,800 3.99 750 3.31 623
Vermont 218 22 19,010 3.96 753 3.11 592
Virginia 14 2 23,546 4.43 1044 3.18 749
Washington 1 1 20,755 4.00 830 3.17 658
West Virginia 15 1 16,889 3.61 609 3.22 544
Wisconsin 551 80 20,359 3.98 810 3.17 646
United States 3,710 501 20,266 3.97 805 3.17 642 

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DHI Lactation Averages for Brown Swiss  
Table 2. Brown Swiss State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
Arizona 24 2 20,374 4.36 889 3.47 708
California 237 27 25,116 4.02 1009 3.35 841
Colorado 951 6 23,817 4.00 952 3.37 804
Connecticut 54 10 22,336 4.26 953 3.33 744
Delaware 4 2 24,438 4.26 1041 3.32 811
Florida 19 2 20,731 3.71 770 3.16 655
Georgia 138 1 22,014 4.03 888 3.38 744
Idaho 99 7 22,696 4.06 922 3.32 752
Illinois 434 41 23,246 4.10 954 3.33 775
Indiana 582 22 23,922 4.19 1002 3.39 810
Iowa 1,022 43 22,381 4.18 936 3.38 757
Kansas 48 4 24,631 4.10 1009 3.27 805
Kentucky 64 5 28,020 4.08 1144 3.32 931
Maine 11 6 21,249 4.30 913 3.32 706
Maryland 98 22 21,935 4.13 906 3.26 715
Massachusetts 105 9 22,504 3.95 889 3.19 719
Michigan 103 31 24,585 4.18 1028 3.36 826
Minnesota 1,273 83 23,985 4.03 967 3.36 806
Mississippi 6 2 20,388 4.22 860 3.36 685
Missouri 417 15 19,827 4.17 826 3.42 679
Nebraska 141 3 19,945 4.58 914 3.50 698
New Hampshire 99 10 18,094 4.06 734 3.30 598
New Jersey 12 6 20,078 4.09 821 3.20 642
New Mexico 26 2 24,862 3.69 919 3.31 822
New York 1,278 137 22,507 4.02 906 3.31 744
North Carolina 82 7 23,634 4.18 987 3.42 808
North Dakota 47 3 17,430 4.14 722 3.54 617
Ohio 890 68 23,446 4.25 997 3.42 803
Oklahoma 31 5 20,342 3.86 786 3.32 676
Oregon 161 10 21,984 4.04 889 3.28 722
Pennsylvania 1,147 145 23,919 4.15 992 3.32 793
South Carolina 9 3 19,296 4.28 826 3.44 663
South Dakota 49 5 24,714 4.08 1009 3.37 832
Tennessee 11 5 19,823 3.76 746 3.24 642
Texas 329 6 22,137 3.64 805 3.50 775
Utah 132 3 22,621 4.08 924 3.48 786
Vermont 552 22 21,845 4.24 926 3.39 741
Virginia 115 15 22,005 3.98 877 3.26 717
Washington 184 8 22,274 4.06 904 3.30 735
West Virginia 11 1 21,262 4.08 868 3.32 707
Wisconsin 2,820 222 24,368 4.21 1026 3.33 812
United States 13,815 1026 23,245 4.12 958 3.36 780 

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DHI Lactation Averages for Guernsey  
Table 3. Guernsey State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
California 84 7 15,426 4.16 642 3.30 508
Colorado 2 1 13,029 4.72 615 3.52 458
Connecticut 23 6 17,733 4.67 829 3.40 603
Florida 8 1 17,210 3.91 673 3.03 521
Georgia 1 1 15,421 4.79 738 3.04 469
Illinois 84 9 17,727 4.38 777 3.33 591
Indiana 158 11 20,364 4.47 911 3.24 660
Iowa 363 11 18,204 4.42 805 3.30 601
Kansas 45 1 17,505 4.32 756 3.25 568
Kentucky 21 4 19,359 3.96 766 3.16 611
Maine 35 5 13,546 4.49 608 3.29 445
Maryland 144 7 17,680 4.68 828 3.35 592
Massachusetts 16 5 17,812 4.76 848 3.31 590
Michigan 2 2 14,260 4.38 625 3.42 487
Minnesota 216 21 16,802 4.55 765 3.30 554
Missouri 180 7 14,760 4.25 627 3.30 487
Nebraska 4 2 18,623 4.52 842 3.34 622
New Hampshire 4 1 16,305 5.02 819 3.26 532
New Jersey 3 2 14,159 4.35 616 3.26 461
New Mexico 2 1 19,898 4.44 884 3.49 694
New York 332 32 17,256 4.61 796 4.39 758
North Carolina 8 2 18,594 4.42 822 3.34 620
North Dakota 2 1 17,062 4.70 802 3.68 628
Ohio 259 20 17,724 4.44 786 3.31 587
Oklahoma 8 2 15,240 4.04 615 3.17 484
Oregon 47 6 18,625 4.36 812 3.28 611
Pennsylvania 484 54 17,869 4.65 830 3.26 582
South Carolina 7 2 15,705 4.66 732 3.34 525
South Dakota 1 1 22,227 4.21 936 3.28 730
Tennessee 36 4 14,536 4.90 712 3.19 464
Utah 3 2 19,825 5.30 1051 3.65 724
Vermont 58 7 15,098 4.88 737 3.28 495
Virginia 4 2 13,759 4.05 558 3.25 447
Washington 80 3 18,239 4.62 842 3.34 609
Wisconsin 1,184 47 19,030 4.64 882 3.42 651
United States 3,908 290 17,916 4.55 816 3.42 613 

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DHI Lactation Averages for Holstein  
Table 4. Holstein State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
Alabama 22 1 23,589 3.50 825 2.88 679
Arizona 22,108 8 25,486 3.67 935 3.11 792
Arkansas 206 6 19,100 3.63 693 3.11 594
California 458,970 133 28,907 3.83 1107 3.16 914
Colorado 27,319 19 27,117 3.86 1046 3.15 855
Connecticut 5,845 38 27,358 4.29 1175 3.14 859
Delaware 1,793 8 27,085 3.95 1069 3.07 831
Florida 13,659 12 26,753 3.73 998 3.09 825
Georgia 3,957 32 27,199 3.88 1056 3.04 827
Idaho 103,628 31 27,005 3.98 1074 3.20 865
Illinois 26,489 152 28,370 3.92 1111 3.12 886
Indiana 28,800 103 27,671 4.06 1124 3.16 874
Iowa 61,335 211 28,073 4.07 1144 3.18 893
Kansas 15,444 47 29,152 3.81 1112 3.21 936
Kentucky 7,817 36 28,205 3.64 1027 3.05 859
Louisiana 598 7 22,193 3.55 789 2.99 663
Maine 7,153 56 28,000 4.05 1135 3.11 871
Maryland 15,795 77 26,399 3.96 1045 3.05 805
Massachusetts 1,935 34 26,557 3.97 1055 3.05 810
Michigan 121,550 231 28,561 3.93 1122 3.13 894
Minnesota 124,911 558 27,323 4.08 1116 3.16 864
Mississippi 794 9 25,179 3.97 1000 3.13 789
Missouri 5,428 72 24,300 3.82 928 3.13 761
Montana 1,025 10 26,319 3.97 1044 3.08 810
Nebraska 12,700 32 25,281 3.96 1001 3.18 803
Nevada 1,503 2 29,931 3.90 1168 3.15 942
New Hampshire 4,291 41 28,010 4.12 1154 3.12 873
New Jersey 1,972 22 26,050 3.82 995 3.01 784
New Mexico 38,478 7 27,097 3.72 1007 3.18 861
New York 252,099 697 27,485 4.07 1118 3.14 863
North Carolina 10,011 38 29,016 4.06 1177 3.10 899
North Dakota 1,719 10 26,298 3.91 1027 3.19 839
Ohio 50,423 268 27,714 4.04 1121 3.14 870
Oklahoma 720 14 21,907 3.59 787 3.09 677
Oregon 9,251 24 25,969 4.04 1048 3.14 815
Pennsylvania 162,829 1058 27,606 3.97 1095 3.08 850
Rhode Island 109 3 30,038 4.04 1214 3.12 938
South Carolina 1,085 11 23,280 3.97 924 3.16 736
South Dakota 23,265 35 26,674 4.11 1097 3.21 855
Tennessee 2,287 28 25,696 3.93 1011 3.02 776
Texas 39,613 36 26,816 3.93 1053 3.27 878
Utah 9,852 35 26,867 3.98 1069 3.18 853
Vermont 29,072 129 27,427 4.03 1106 3.17 869
Virginia 22,224 77 27,313 3.91 1069 3.05 834
Washington 34,319 34 27,480 4.01 1101 3.17 872
West Virginia 547 9 25,211 3.74 942 3.00 757
Wisconsin 428,051 1026 28,789 4.03 1161 3.14 904
United States 2,193,001 5527 28,023 3.96 1111 3.15 882 

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DHI Lactation Averages for Jersey  
Table 5. Jersey State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
Arizona 4,576 6 18,847 4.67 881 3.55 668
Arkansas 50 2 13,925 4.18 583 3.56 496
California 136,771 87 21,014 4.79 1006 3.71 779
Colorado 1,189 10 18,843 4.99 940 3.68 694
Connecticut 380 20 18,313 4.88 894 3.56 652
Delaware 161 3 21,089 5.19 1095 3.56 750
Florida 194 6 17,425 4.19 731 3.37 587
Georgia 86 9 18,362 4.65 855 3.44 632
Idaho 9,167 18 19,100 4.82 920 3.56 681
Illinois 3,063 55 19,440 4.92 957 3.66 712
Indiana 786 38 20,046 4.80 962 3.50 701
Iowa 9,603 67 18,880 4.92 929 3.68 695
Kansas 847 13 18,840 4.84 912 3.71 698
Kentucky 797 16 18,267 4.56 833 3.67 670
Maine 1,745 22 20,261 5.18 1049 3.65 740
Maryland 1,377 34 17,840 4.82 861 3.51 626
Massachusetts 209 13 18,156 5.22 947 3.67 666
Michigan 1,928 53 20,523 4.67 959 3.59 737
Minnesota 6,642 110 18,829 4.77 898 3.68 692
Mississippi 1,163 10 17,566 4.33 760 3.60 632
Missouri 1,362 30 18,061 4.51 815 3.62 654
Montana 11 1 16,921 5.22 884 3.97 672
Nebraska 1,803 10 18,411 4.66 858 3.56 656
New Hampshire 733 21 18,183 5.11 928 3.70 673
New Jersey 109 10 16,276 4.74 772 3.46 562
New Mexico 7,006 5 20,754 4.47 928 3.62 752
New York 8,069 275 19,978 4.98 995 3.62 722
North Carolina 1,901 19 20,340 4.60 936 3.54 719
North Dakota 461 4 24,295 4.52 1098 3.54 859
Ohio 6,092 114 19,644 5.01 984 3.72 731
Oklahoma 526 14 15,553 4.56 709 3.64 566
Oregon 16,372 23 20,933 4.81 1007 3.71 776
Pennsylvania 8,937 321 19,466 4.98 969 3.65 711
Rhode Island 14 2 14,368 4.78 687 3.57 513
South Carolina 596 7 18,163 4.74 860 3.58 650
South Dakota 6,900 10 19,637 5.04 990 3.83 753
Tennessee 1,017 18 17,916 4.75 852 3.57 640
Texas 82,078 21 22,842 4.79 1094 3.68 840
Utah 2,993 19 20,825 4.82 1005 3.74 778
Vermont 2,522 93 17,741 4.95 879 3.62 643
Virginia 799 21 17,724 4.72 837 3.54 627
Washington 7,757 21 21,451 4.95 1061 3.54 759
West Virginia 225 4 14,121 4.94 698 3.64 514
Wisconsin 20,453 341 20,033 5.01 1004 3.63 727
United States 359,470 1996 20,931 4.82 1008 3.68 769 

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DHI Lactation Averages for Milking Shorthorn  
Table 6. Milking Shorthorn State and national standardized lactation averages for cows
calving in 2020 with records used in national genetic evaluations

  Records Herds Milk Fat Protein
State (no.) (no.) (lb) (%) (lb) (%) (lb)
Arkansas 37 1 16,370 3.52 577 3.25 531
California 55 4 30,621 3.82 1170 3.12 957
Colorado 5 1 22,674 3.73 845 3.11 705
Connecticut 2 2 19,496 4.27 832 3.34 652
Delaware 2 1 18,001 3.89 700 3.01 541
Florida 14 1 17,241 3.54 610 3.08 531
Illinois 88 13 19,957 3.79 757 3.12 623
Indiana 43 10 21,541 3.96 852 3.20 690
Iowa 100 18 20,320 3.69 749 3.09 627
Kentucky 11 4 20,846 3.67 765 3.09 643
Maine 14 4 14,217 3.58 509 2.92 415
Maryland 92 9 18,428 3.92 722 3.15 580
Massachusetts 15 4 16,529 3.44 569 3.08 508
Michigan 15 5 25,358 3.74 948 3.16 802
Minnesota 162 33 20,611 3.98 821 3.16 650
Missouri 25 6 15,972 3.96 632 3.19 509
Nebraska 6 2 19,924 3.89 775 3.20 639
New Hampshire 119 5 16,828 3.62 608 3.18 536
New Mexico 1 1 27,795 3.29 914 2.95 820
New York 114 33 19,588 3.63 711 3.03 594
North Dakota 8 1 17,389 4.24 737 3.28 571
Ohio 61 13 16,555 3.69 611 3.10 513
Oklahoma 64 5 16,658 3.84 639 3.22 537
Oregon 4 2 19,746 3.73 736 3.25 641
Pennsylvania 181 38 20,549 3.74 769 3.06 628
Rhode Island 2 1 12,169 3.80 463 3.28 400
South Dakota 5 2 18,580 4.02 747 3.16 586
Tennessee 2 2 13,410 3.74 502 3.11 418
Texas 168 5 19,140 3.82 730 3.16 605
Utah 22 1 13,154 3.69 486 3.05 401
Vermont 26 4 18,546 4.01 744 3.19 592
Virginia 5 1 22,901 3.70 847 3.26 747
Washington 55 2 18,949 4.12 780 3.26 618
Wisconsin 1,012 68 23,964 3.92 938 3.16 757
United States 2,535 302 21,246 3.85 818 3.14 668 

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DHI Lactation Averages Over Time  
Tables 7A-7F. Summary of National Standardized Lactation Averages
for Cows With Records Used in National Genetic Evaluations

  Table 7A. Records (no.)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 13,465 11,576 7,035 5,989 6,045 5,977 5,727 5,559 5,318 5,235 5,077 4,676 4,261 3,764 3,710
Brown Swiss 17,236 17,717 15,704 16,029 18,069 18,243 18,379 17,997 18,028 17,911 17,036 16,634 15,485 14,462 13,815
Guernsey 38,364 25,805 9,406 7,248 6,144 6,076 5,807 5,532 5,505 5,469 5,258 5,101 4,836 4,207 3,908
Holstein 1,109,758 1,720,127 1,624,058 1,650,001 2,020,821 2,103,095 2,157,122 2,175,009 2,227,408 2,291,188 2,318,759 2,330,737 2,307,090 2,228,333 2,193,001
Jersey 63,305 99,416 106,837 128,236 182,137 209,844 229,075 253,850 274,834 296,775 317,697 337,230 361,747 370,176 359,470
Milking Shorthorn 2,302 2,684 2,407 2,723 3,091 3,288 3,166 3,126 2,771 2,606 2,558 2,551 2,375 2,103 2,535 

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  Table 7B. Milk (lb)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 13,144 14,799 17,389 18,303 18,275 18,295 18,440 18,478 18,918 19,124 19,254 19,221 19,134 19,537 20,266
Brown Swiss 14,172 16,250 20,300 21,405 21,857 21,996 22,214 22,130 22,475 22,691 22,657 22,625 22,497 22,737 23,245
Guernsey 11,666 13,297 16,043 17,154 17,351 17,349 17,578 17,429 17,622 17,907 17,806 17,946 17,400 17,528 17,916
Holstein 17,566 20,178 24,517 25,644 25,757 25,987 26,312 26,639 27,031 27,251 27,441 27,418 27,405 27,686 28,023
Jersey 11,437 13,407 17,038 18,087 18,565 19,004 19,359 19,793 20,454 20,592 20,894 20,708 20,583 20,740 20,931
Milking Shorthorn 11,560 14,011 16,548 17,582 18,137 18,319 18,131 17,868 18,578 19,122 18,913 18,874 18,851 19,662 21,246 

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  Table 7C. Fat (%)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 3.88 3.85 3.86 3.82 3.85 3.84 3.85 3.90 3.91 3.91 3.91 3.94 3.96 3.95 3.97
Brown Swiss 4.06 3.98 4.01 4.00 3.97 3.97 4.02 4.06 4.02 4.04 4.06 4.09 4.09 4.07 4.12
Guernsey 4.60 4.49 4.46 4.42 4.43 4.41 4.42 4.48 4.52 4.49 4.50 4.51 4.51 4.51 4.55
Holstein 3.61 3.61 3.64 3.65 3.65 3.67 3.71 3.73 3.72 3.73 3.78 3.82 3.86 3.90 3.96
Jersey 4.84 4.73 4.60 4.62 4.69 4.70 4.75 4.77 4.76 4.77 4.82 4.84 4.83 4.82 4.82
Milking Shorthorn 3.69 3.58 3.59 3.58 3.66 3.65 3.67 3.69 3.72 3.74 3.78 3.79 3.81 3.81 3.85 

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  Table 7D. Fat (lb)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 510 570 671 700 704 703 711 720 740 747 753 758 758 772 805
Brown Swiss 576 646 814 856 867 874 894 898 903 918 919 924 919 926 958
Guernsey 536 598 716 758 769 766 776 781 796 804 802 810 784 790 816
Holstein 633 729 893 936 941 955 977 993 1005 1017 1037 1048 1058 1079 1111
Jersey 553 634 784 835 870 893 919 944 973 982 1007 1002 994 1000 1008
Milking Shorthorn 426 502 595 630 664 669 666 659 691 716 714 715 719 749 818 

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  Table 7E. Protein (%)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 3.16 3.13 3.12 3.14 3.14 3.14 3.15 3.15 3.15 3.15 3.16 3.16 3.16 3.17
Brown Swiss 3.33 3.31 3.30 3.29 3.31 3.32 3.34 3.34 3.32 3.34 3.35 3.35 3.35 3.36
Guernsey 3.30 3.31 3.27 3.26 3.27 3.27 3.29 3.30 3.31 3.32 3.33 3.32 3.33 3.42
Holstein 2.94 3.00 3.01 3.03 3.04 3.05 3.06 3.06 3.06 3.08 3.10 3.11 3.12 3.15
Jersey 3.60 3.58 3.57 3.60 3.62 3.61 3.63 3.62 3.63 3.65 3.68 3.68 3.68 3.68
Milking Shorthorn 3.09 3.10 3.09 3.09 3.11 3.11 3.11 3.10 3.09 3.10 3.11 3.12 3.12 3.14 

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  Table 7F. Protein (lb)
  Calving year
Breed 1980 1990 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Ayrshire 468 545 571 573 574 580 581 597 602 606 607 604 616 642
Brown Swiss 541 672 707 719 729 738 739 750 754 756 758 754 762 780
Guernsey 439 531 561 565 567 575 573 581 592 592 597 578 583 613
Holstein 592 733 772 781 791 803 816 828 834 845 850 852 865 882
Jersey 482 610 646 669 688 699 718 741 748 763 762 757 764 769
Milking Shorthorn 433 512 543 561 570 563 556 576 590 587 587 588 614 668 

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We wish to acknowledge the contribution of the dairy producers who supplied data for this report through their participation in the DHI program and the DRPCs that processed and relayed the information on to CDCB.