Statewide Production
| Year | Number of Surface Permits | Surface Tonnage | Number of Underground Permits | Underground Tonnage | Total Tonnage | Total Surface (surface&lignite) | Total Underground (underground only) | Total Tonnage (surf, lignite, underground only) |
| 2006 | 113 | 10,425,126 | 128 | 15,857,283 | 26,282,409 | 10,425,126 | 15,857,283 | 26,282,409 |
| 2005 | 122 | 9,702,937 | 140 | 17,397,138 | 27,100,074 | 9,702,937 | 17,397,138 | 27,100,074 |
| 2004 | 117 | 10,008,930 | 143 | 19,601,891 | 29,610,822 | 10,008,930 | 19,601,891 | 29,610,822 |
| 2003 | 127 | 9,170,198 | 166 | 20,406,302 | 29,576,499 | 9,170,198 | 20,406,302 | 29,576,499 |
| 2002 | 117 | 9,260,301 | 167 | 18,331,968 | 27,592,269 | 9,260,301 | 18,331,968 | 27,592,269 |
| 2001 | 117 | 9,579,653 | 208 | 23,116,084 | 32,695,737 | 9,579,653 | 23,116,084 | 32,695,737 |
| 2000 | 143 | 9,664,187 | 233 | 20,981,423 | 30,645,610 | 9,664,187 | 20,981,423 | 30,645,610 |
| 1999 | 122 | 8,465,602 | 243 | 21,930,543 | 30,396,146 | 8,465,602 | 21,930,543 | 30,396,146 |
| 1998 | 119 | 8,281,506 | 256 | 24,843,148 | 33,124,654 | 8,281,506 | 24,843,148 | 33,124,654 |
| 1997 | 109 | 9,579,790 | 261 | 25,336,052 | 34,915,843 | 9,579,790 | 25,336,052 | 34,915,843 |
| 1996 | 102 | 9,714,379 | 249 | 23,351,709 | 33,066,089 | 9,714,379 | 23,351,709 | 33,066,089 |
| 1995 | 101 | 8,894,861 | 292 | 25,994,188 | 34,889,049 | 8,894,861 | 25,994,188 | 34,889,049 |
| 1994 | 76 | 9,229,785 | 239 | 27,503,521 | 36,733,306 | 9,229,785 | 27,503,521 | 36,733,306 |
| 1993 | 79 | 8,615,708 | 237 | 31,111,947 | 39,727,655 | 8,615,708 | 31,111,947 | 39,727,655 |
| 1992 | 179 | 7,719,107 | 463 | 32,517,324 | 40,236,432 | 7,719,107 | 32,517,324 | 40,236,432 |
| 1991 | 134 | 7,801,236 | 324 | 34,053,208 | 41,854,444 | 7,801,236 | 34,053,208 | 41,854,444 |
| 1990 | 175 | 7,017,244 | 372 | 37,596,522 | 44,613,766 | 7,017,244 | 37,596,522 | 44,613,766 |
| 1989 | 119 | 7,335,784 | 315 | 37,586,808 | 44,922,592 | 7,335,784 | 37,586,808 | 44,922,592 |
| 1988 | 139 | 8,187,954 | 357 | 38,034,662 | 46,222,616 | 8,187,954 | 38,034,662 | 46,222,616 |
| 1987 | 144 | 7,040,068 | 399 | 33,401,711 | 40,441,780 | 7,040,068 | 33,401,711 | 40,441,780 |
| 1986 | 126 | 7,025,874 | 445 | 33,295,955 | 40,321,829 | 7,025,874 | 33,295,955 | 40,321,829 |
| 1985 | 141 | 7,647,979 | 486 | 30,762,741 | 38,410,720 | 7,647,979 | 30,762,741 | 38,410,720 |
| 1984 | 130 | 7,501,844 | 479 | 29,200,609 | 36,702,452 | 7,501,844 | 29,200,609 | 36,702,452 |
| 1983 | 158 | 7,654,736 | 476 | 24,058,880 | 31,713,616 | 7,654,736 | 24,058,880 | 31,713,616 |
| 1982 | 194 | 8,945,784 | 546 | 34,424,619 | 43,370,402 | 8,945,784 | 34,424,619 | 43,370,402 |
| 1981 | 178 | 8,165,981 | 505 | 27,476,412 | 35,642,392 | 8,165,981 | 27,476,412 | 35,642,392 |
| 1980 | 186 | 8,404,345 | 491 | 27,738,939 | 36,143,284 | 8,404,345 | 27,738,939 | 36,143,284 |
| 1979 | 214 | 8,743,206 | 498 | 24,212,788 | 32,955,995 | 8,743,206 | 24,212,788 | 32,955,995 |
| 1978 | 274 | 7,730,406 | 446 | 14,111,642 | 21,842,048 | 7,730,406 | 14,111,642 | 21,842,048 |