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 2001 2002 2003 2004 2005 2006 2007
Ayrshire 13,465 11,576 9,526 7,035 6,552 6,755 6,556 6,190 5,989 6,332 6,198
Brown Swiss 17,236 17,717 17,721 15,704 15,473 15,639 15,779 15,771 16,029 17,439 17,406
Guernsey 38,364 25,805 15,420 9,406 8,690 8,293 7,880 7,508 7,248 6,852 6,727
Holstein 1,109,758 1,720,127 1,769,002 1,624,058 1,588,990 1,589,782 1,564,378 1,597,548 1,650,001 1,720,541 1,793,105
Jersey 63,305 99,416 105,672 106,837 108,934 115,472 115,951 121,343 128,236 137,578 143,634
Milking Shorthorn 2,302 2,684 2,662 2,407 2,323 2,534 2,619 2,619 2,723 3,094 3,056
Red and White 900 5,588 6,281 3,927 3,578 3,334 3,002 2,756 2,636 2,665 2,581 

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  Table 8B. Milk (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2001 2002 2003 2004 2005 2006 2007
Ayrshire 13,144 14,799 15,684 17,389 17,878 17,880 17,738 17,885 18,303 18,232 18,220
Brown Swiss 14,172 16,250 17,493 20,300 20,694 20,869 20,715 20,757 21,405 21,413 21,533
Guernsey 11,666 13,297 14,051 16,043 16,410 16,398 16,469 16,692 17,154 17,394 17,243
Holstein 17,566 20,178 21,618 24,517 24,889 24,996 24,876 25,139 25,644 25,674 25,639
Jersey 11,437 13,407 14,842 17,038 17,472 17,663 17,612 17,732 18,087 18,159 18,265
Milking Shorthorn 11,560 14,011 15,341 16,548 17,008 17,144 17,381 17,267 17,582 17,502 17,461
Red and White 16,470 18,832 20,161 22,845 22,981 23,102 22,933 23,186 23,815 23,764 23,637 

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  Table 8C. Fat (%)
  Calving Year
Breed 1980 1990 1995 2000 2001 2002 2003 2004 2005 2006 2007
Ayrshire 3.88 3.85 3.86 3.86 3.84 3.85 3.84 3.80 3.82 3.83 3.82
Brown Swiss 4.06 3.98 4.01 4.01 4.00 4.01 3.99 3.99 4.00 4.00 3.98
Guernsey 4.60 4.49 4.49 4.46 4.44 4.45 4.44 4.42 4.42 4.41 4.39
Holstein 3.61 3.61 3.64 3.64 3.63 3.65 3.65 3.64 3.65 3.66 3.65
Jersey 4.84 4.73 4.64 4.60 4.59 4.61 4.61 4.60 4.62 4.61 4.58
Milking Shorthorn 3.69 3.58 3.58 3.59 3.57 3.58 3.57 3.57 3.58 3.63 3.66
Red and White 3.62 3.67 3.68 3.66 3.65 3.65 3.65 3.63 3.63 3.69 3.71 

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  Table 8D. Fat (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2001 2002 2003 2004 2005 2006 2007
Ayrshire 510 570 605 671 687 689 681 680 700 698 696
Brown Swiss 576 646 701 814 827 837 827 828 856 857 856
Guernsey 536 598 630 716 728 730 731 737 758 767 757
Holstein 633 729 786 893 904 911 907 915 936 941 936
Jersey 553 634 689 784 802 814 812 815 835 838 836
Milking Shorthorn 426 502 549 595 608 614 620 616 630 636 639
Red and White 596 692 742 837 839 843 837 842 865 877 878 

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  Table 8E. Protein (%)
  Calving Year
Breed 1980 1990 1995 2000 2001 2002 2003 2004 2005 2006 2007
Ayrshire 3.16 3.13 3.13 3.12 3.12 3.13 3.13 3.12 3.13 3.13
Brown Swiss 3.33 3.32 3.31 3.30 3.30 3.31 3.32 3.30 3.30 3.30
Guernsey 3.30 3.27 3.31 3.29 3.28 3.29 3.29 3.27 3.27 3.27
Holstein 2.94 2.94 3.00 3.00 3.00 3.01 3.02 3.01 3.02 3.01
Jersey 3.60 3.56 3.58 3.57 3.55 3.56 3.57 3.57 3.58 3.57
Milking Shorthorn 3.09 3.07 3.10 3.07 3.08 3.08 3.09 3.09 3.10 3.09
Red and White 2.95 2.94 2.98 2.97 2.96 2.97 2.98 2.99 3.00 3.01 

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  Table 8F. Protein (lbs)
  Calving Year
Breed 1980 1990 1995 2000 2001 2002 2003 2004 2005 2006 2007
Ayrshire 468 491 545 558 558 555 560 571 570 570
Brown Swiss 541 581 672 683 688 685 688 707 707 710
Guernsey 439 460 531 540 538 541 549 561 569 563
Holstein 592 636 733 745 749 748 758 772 776 772
Jersey 482 529 610 625 628 627 633 646 650 652
Milking Shorthorn 433 471 512 522 528 535 533 543 540 539
Red and White 555 594 680 683 684 682 692 711 712 711 

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