Tables 8A-8F. Summary of National Standardized Lactation Averages
for Cows With Records Used in National Genetic Evaluations.

  Table 8A. Number of Records
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 13,465 11,576 9,526 7,035 5,989 6,332 6,198 6,439 6,242 6,045
Brown Swiss 17,236 17,717 17,721 15,704 16,029 17,439 17,406 17,887 17,765 18,069
Guernsey 38,364 25,805 15,420 9,406 7,248 6,852 6,727 6,386 6,222 6,144
Holstein 1,109,758 1,720,127 1,769,002 1,624,058 1,650,001 1,720,541 1,793,105 1,875,058 1,935,705 2,020,821
Jersey 63,305 99,416 105,672 106,837 128,236 137,578 143,634 154,137 165,184 182,137
Milking Shorthorn 2,302 2,684 2,662 2,407 2,723 3,094 3,056 3,157 3,092 3,091
Red and White 900 5,588 6,281 3,927 2,636 2,665 2,581 2,416 2,355 2,370 

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  Table 8B. Milk (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 13,144 14,799 15,684 17,389 18,303 18,232 18,220 18,145 18,238 18,275
Brown Swiss 14,172 16,250 17,493 20,300 21,405 21,413 21,533 21,522 21,736 21,857
Guernsey 11,666 13,297 14,051 16,043 17,154 17,394 17,243 17,274 17,269 17,351
Holstein 17,566 20,178 21,618 24,517 25,644 25,674 25,639 25,567 25,635 25,757
Jersey 11,437 13,407 14,842 17,038 18,087 18,159 18,265 18,328 18,315 18,565
Milking Shorthorn 11,560 14,011 15,341 16,548 17,582 17,502 17,461 17,040 17,607 18,137
Red and White 16,470 18,832 20,161 22,845 23,815 23,764 23,637 23,459 23,042 23,342 

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  Table 8C. Fat (%)
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 3.88 3.85 3.86 3.86 3.82 3.83 3.82 3.84 3.85 3.85
Brown Swiss 4.06 3.98 4.01 4.01 4.00 4.00 3.98 3.99 3.98 3.97
Guernsey 4.60 4.49 4.49 4.46 4.42 4.41 4.39 4.39 4.41 4.43
Holstein 3.61 3.61 3.64 3.64 3.65 3.66 3.65 3.65 3.63 3.65
Jersey 4.84 4.73 4.64 4.60 4.62 4.61 4.58 4.58 4.62 4.69
Milking Shorthorn 3.69 3.58 3.58 3.59 3.58 3.63 3.66 3.71 3.65 3.66
Red and White 3.62 3.67 3.68 3.66 3.63 3.69 3.71 3.73 3.70 3.73 

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  Table 8D. Fat (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 510 570 605 671 700 698 696 697 702 704
Brown Swiss 576 646 701 814 856 857 856 858 865 867
Guernsey 536 598 630 716 758 767 757 759 762 769
Holstein 633 729 786 893 936 941 936 934 932 941
Jersey 553 634 689 784 835 838 836 839 847 870
Milking Shorthorn 426 502 549 595 630 636 639 631 642 664
Red and White 596 692 742 837 865 877 878 876 853 871 

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  Table 8E. Protein (%)
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 3.16 3.13 3.13 3.12 3.13 3.13 3.14 3.13 3.14
Brown Swiss 3.33 3.32 3.31 3.30 3.30 3.30 3.30 3.30 3.29
Guernsey 3.30 3.27 3.31 3.27 3.27 3.27 3.26 3.26 3.26
Holstein 2.94 2.94 3.00 3.01 3.02 3.01 3.01 3.02 3.03
Jersey 3.60 3.56 3.58 3.57 3.58 3.57 3.58 3.59 3.60
Milking Shorthorn 3.09 3.07 3.10 3.09 3.10 3.09 3.09 3.09 3.09
Red and White 2.95 2.94 2.98 2.99 3.00 3.01 3.00 3.02 3.02 

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  Table 8F. Protein (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2005 2006 2007 2008 2009 2010
Ayrshire 468 491 545 571 570 570 569 571 573
Brown Swiss 541 581 672 707 707 710 711 717 719
Guernsey 439 460 531 561 569 563 563 563 565
Holstein 592 636 733 772 776 772 771 775 781
Jersey 482 529 610 646 650 652 656 658 669
Milking Shorthorn 433 471 512 543 540 539 527 544 561
Red and White 555 594 680 711 712 711 703 695 705 

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