|
| 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 | 35.91 | NA |
| 1993 | 35.51 | -1.11 % |
| 1994 | 39.46 | 11.12 % |
| 1995 | 32 | -18.91 % |
| 1996 | 30 | -6.25 % |
| 1997 | 29.37 | -2.10 % |
| 1998 | 31.16 | 6.09 % |
| 1999 | 25 | -19.77 % |
| 2000 | 24 | -4.00 % |
| 2001 | 23 | -4.17 % |
| 2002 | 22 | -4.35 % |
| 2003 | 22 | 0.00 % |
| 2004 | 20.25 | -7.95 % |
| 2005 | 18.66 | -7.85 % |
| 2006 | 16.75 | -10.24 % |
Source: United States Energy Information Administration
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