| State | 2018 Annual Production | 2017 Annual Production | 2016 Annual Production |
|---|---|---|---|
| Alabama | 14783 | 12861 | 9643 |
| Alaska | 902 | 959 | 932 |
| Arizona | 6550 | 6221 | 5423 |
| Arkansas | 0 | 43 | 49 |
| Colorado | 14026 | 15047 | 12634 |
| Illinois | 49482 | 48204 | 43422 |
| Indiana | 34598 | 31472 | 28767 |
| Kansas | 0 | 0 | 27 |
| Kentucky | 39740 | 41784 | 42868 |
| Louisiana | 1483 | 2079 | 2798 |
| Maryland | 1298 | 1808 | 1616 |
| Mississippi | 2940 | 2604 | 2870 |
| Missouri | 259 | 244 | 234 |
| Montana | 38610 | 35232 | 32336 |
| New Mexico | 10792 | 13844 | 13341 |
| North Dakota | 29643 | 28788 | 28121 |
| Ohio | 8993 | 9489 | 12564 |
| Oklahoma | 716 | 561 | 654 |
| Pennsylvania | 49968 | 49085 | 45720 |
| Tennessee | 232 | 431 | 644 |
| Texas | 24823 | 36382 | 39001 |
| Utah | 13619 | 14326 | 13966 |
| Virginia | 13012 | 13202 | 12910 |
| West Virginia | 95510 | 92791 | 79757 |
| Wyoming | 304188 | 316454 | 297218 |