| 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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