| STATE | 1996* | 1995 | 1994 |
| North Dakota | 393.4 | 300.1 | 536.4 |
| Kansas | 255.2 | 286.0 | 433.2 |
| Montana | 190.1 | 195.8 | 170.6 |
| Washington | 182.7 | 153.8 | 134.0 |
| South Dakota | 130.5 | 90.7 | 95.3 |
| Idaho | 117.0 | 103.3 | 100.3 |
| Minnesota | 104.8 | 71.8 | 71.3 |
| Oklahoma | 93.1 | 109.2 | 143.1 |
| Colorado | 76.0 | 105.3 | 79.7 |
| Nebraska | 73.1 | 86.1 | 71.4 |
| Texas | 69.6 | 75.6 | 75.4 |
| Oregon | 68.0 | 63.7 | 58.6 |
| Arkansas | 64.5 | 47.0 | 40.5 |
| Ohio | 55.4 | 72.8 | 68.4 |
| California | 53.7 | 32.7 | 44.4 |
| Missouri | 52.0 | 48.0 | 50.4 |
| Illinois | 42.9 | 68.1 | 50.4 |
| Kentucky | 28.0 | 24.4 | 25.2 |
| North Carolina | 26.6 | 28.1 | 30.4 |
| Michigan | 26.0 | 37.2 | 30.7 |
| Indiana | 25.9 | 39.6 | 38.4 |
| Tennessee | 18.9 | 16.0 | 15.0 |
| Arizona | 16.7 | 10.4 | 11.2 |
| Georgia | 16.5 | 11.4 | 20.4 |
| Virginia | 15.4 | 17.6 | 14.0 |
| South Carolina | 13.0 | 9.0 | 18.0 |
| Maryland | 12.5 | 14.4 | 12.1 |
| Mississippi | 10.6 | 6.3 | 6.4 |
| Pennsylvania | 10.5 | 10.2 | 7.9 |
| New York | 7.8 | 6.9 | 6.1 |
| Utah | 7.6 | 9.0 | 7.0 |
| Wyoming | 6.8 | 7.9 | 5.0 |
| Wisconsin | 6.6 | 8.1 | 7.9 |
| Louisiana | 5.6 | 2.9 | 2.6 |
| Delaware | 4.4 | 4.4 | 3.8 |
| New Mexico | 4.1 | 3.3 | 5.5 |
| Alabama | 3.6 | 2.9 | 4.6 |
| Iowa | 2.2 | 1.2 | 2.1 |
| New Jersey | 1.9 | 1.8 | 1.3 |
| Nevada | 1.6 | 0.9 | 0.7 |
| * Indicated September 1996 | |||