|
| 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 | 2.15 | NA |
| 1993 | 1.88 | -12.56 % |
| 1994 | 1.53 | -18.62 % |
| 1995 | 1.89 | 23.53 % |
| 1996 | 1.88 | -0.53 % |
| 1997 | 1.7 | -9.57 % |
| 1998 | 1.6 | -5.88 % |
| 1999 | 1.53 | -4.38 % |
| 2000 | 2 | 30.72 % |
| 2001 | 2 | 0.00 % |
| 2002 | 1.52 | -24.00 % |
| 2003 | 1.38 | -9.21 % |
| 2004 | 1.4 | 1.45 % |
| 2005 | 2 | 42.86 % |
| 2006 | 2 | 0.00 % |
Source: United States Energy Information Administration
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