McLean County Historical Production Figures |
| YEAR | SURFACE | UNDERGROUND | TOTAL |
| 1923 | 17,394 | 90,445 | 107,839 |
| 1924 | 2,960 | 18,485 | 21,445 |
| 1948 | 26,420 | 98,387 | 124,807 |
| 1960 | 58,197 | 667 | 58,864 |
| 1961 | 78,642 | 200 | 78,842 |
| 1962 | 73,763 | 210 | 73,973 |
| 1963 | 56,654 | 12,000 | 68,654 |
| 1964 | 18,498 | - | 18,498 |
| 1970 | 93,500 | - | 93,500 |
| 1971 | 474,353 | - | 474,353 |
| 1972 | 1,108,658 | - | 1,108,658 |
| 1973 | 1,309,335 | - | 1,309,335 |
| 1974 | 865,380 | - | 865,380 |
| 1975 | 855,790 | - | 855,790 |
| 1976 | 751,381 | - | 751,381 |
| 1977 | 669,834 | - | 669,834 |
| 1978 | 409,217 | - | 409,217 |
| 1979 | 64,010 | - | 64,010 |
| 1980 | 204,420 | - | 204,420 |
| 1981 | 81,194 | - | 81,194 |
| 1982 | 98,872 | - | 98,872 |
| 1983 | 48,667 | - | 48,667 |
| 1984 | 191,982 | - | 191,982 |
| 1985 | 248,678 | - | 248,678 |
| 1986 | 102,489 | - | 102,489 |
| 1987 | 111,956 | - | 111,956 |
| 1988 | 231,459 | - | 231,459 |
| 1989 | 468,138 | - | 468,138 |
| 1990 | 221,072 | - | 221,072 |
| 1991 | 309,287 | - | 309,287 |
| 1992 | 198,099 | - | 198,099 |
| 1993 | 91,023 | - | 91,023 |
| 1994 | 65,199 | - | 65,199 |
| 1996 | 23,922 | 71,200 | 95,122 |
| 1997 | 507,004 | 1,165,000 | 1,672,004 |
| *NOTE: Source: |