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

  Table 8A. Records (no.)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 13,465 11,576 7,035 5,989 6,332 6,198 6,439 6,242 6,045 5,977
Brown Swiss 17,236 17,717 15,704 16,029 17,439 17,406 17,887 17,765 18,069 18,243
Guernsey 38,364 25,805 9,406 7,248 6,852 6,727 6,386 6,222 6,144 6,076
Holstein 1,109,758 1,720,127 1,624,058 1,650,001 1,720,541 1,793,105 1,875,058 1,935,705 2,020,821 2,103,095
Jersey 63,305 99,416 106,837 128,236 137,578 143,634 154,137 165,184 182,137 209,844
Milking Shorthorn 2,302 2,684 2,407 2,723 3,094 3,056 3,157 3,092 3,091 3,288
Red and White 900 5,588 3,927 2,636 2,665 2,581 2,416 2,355 2,370 2,306 

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  Table 8B. Milk (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 13,144 14,799 17,389 18,303 18,232 18,220 18,145 18,238 18,275 18,295
Brown Swiss 14,172 16,250 20,300 21,405 21,413 21,533 21,522 21,736 21,857 21,996
Guernsey 11,666 13,297 16,043 17,154 17,394 17,243 17,274 17,269 17,351 17,349
Holstein 17,566 20,178 24,517 25,644 25,674 25,639 25,567 25,635 25,757 25,987
Jersey 11,437 13,407 17,038 18,087 18,159 18,265 18,328 18,315 18,565 19,004
Milking Shorthorn 11,560 14,011 16,548 17,582 17,502 17,461 17,040 17,607 18,137 18,319
Red and White 16,470 18,832 22,845 23,815 23,764 23,637 23,459 23,042 23,342 23,439 

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  Table 8C. Fat (%)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 3.88 3.85 3.86 3.82 3.83 3.82 3.84 3.85 3.85 3.84
Brown Swiss 4.06 3.98 4.01 4.00 4.00 3.98 3.99 3.98 3.97 3.97
Guernsey 4.60 4.49 4.46 4.42 4.41 4.39 4.39 4.41 4.43 4.41
Holstein 3.61 3.61 3.64 3.65 3.66 3.65 3.65 3.63 3.65 3.67
Jersey 4.84 4.73 4.60 4.62 4.61 4.58 4.58 4.62 4.69 4.70
Milking Shorthorn 3.69 3.58 3.59 3.58 3.63 3.66 3.71 3.65 3.66 3.65
Red and White 3.62 3.67 3.66 3.63 3.69 3.71 3.73 3.70 3.73 3.72 

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  Table 8D. Fat (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 510 570 671 700 698 696 697 702 704 703
Brown Swiss 576 646 814 856 857 856 858 865 867 874
Guernsey 536 598 716 758 767 757 759 762 769 766
Holstein 633 729 893 936 941 936 934 932 941 955
Jersey 553 634 784 835 838 836 839 847 870 893
Milking Shorthorn 426 502 595 630 636 639 631 642 664 669
Red and White 596 692 837 865 877 878 876 853 871 872 

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  Table 8E. Protein (%)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 3.16 3.13 3.12 3.13 3.13 3.14 3.13 3.14 3.14
Brown Swiss 3.33 3.31 3.30 3.30 3.30 3.30 3.30 3.29 3.31
Guernsey 3.30 3.31 3.27 3.27 3.27 3.26 3.26 3.26 3.27
Holstein 2.94 3.00 3.01 3.02 3.01 3.01 3.02 3.03 3.04
Jersey 3.60 3.58 3.57 3.58 3.57 3.58 3.59 3.60 3.62
Milking Shorthorn 3.09 3.10 3.09 3.10 3.09 3.09 3.09 3.09 3.11
Red and White 2.95 2.98 2.99 3.00 3.01 3.00 3.02 3.02 3.05 

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  Table 8F. Protein (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 468 545 571 570 570 569 571 573 574
Brown Swiss 541 672 707 707 710 711 717 719 729
Guernsey 439 531 561 569 563 563 563 565 567
Holstein 592 733 772 776 772 771 775 781 791
Jersey 482 610 646 650 652 656 658 669 688
Milking Shorthorn 433 512 543 540 539 527 544 561 570
Red and White 555 680 711 712 711 703 695 705 714 

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