|
| year | production | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 35.55 | NA |
| 1993 | 47 | 32.21 % |
| 1994 | 75 | 59.57 % |
| 1995 | 115 | 53.33 % |
| 1996 | 114.75 | -0.22 % |
| 1997 | 112.35 | -2.09 % |
| 1998 | 116 | 3.25 % |
| 1999 | 102 | -12.07 % |
| 2000 | 91.34 | -10.45 % |
| 2001 | 85 | -6.94 % |
| 2002 | 79.43 | -6.55 % |
| 2003 | 90.04 | 13.36 % |
| 2004 | 81 | -10.04 % |
| 2005 | 67.53 | -16.63 % |
| 2006 | 58.84 | -12.87 % |
Source: United States Energy Information Administration
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