|
| year | production | change |
| 1980 | 0 | NA |
| 1981 | 0 | NA |
| 1982 | 0 | NA |
| 1983 | 0 | NA |
| 1984 | 0 | NA |
| 1985 | 0 | NA |
| 1986 | 0 | NA |
| 1987 | 0 | NA |
| 1988 | 0 | NA |
| 1989 | 0 | NA |
| 1990 | 0 | NA |
| 1991 | 0.2 | NA |
| 1992 | 53 | 26,400.00 % |
| 1993 | 125.88 | 137.51 % |
| 1994 | 110 | -12.62 % |
| 1995 | 100 | -9.09 % |
| 1996 | 103.36 | 3.36 % |
| 1997 | 80 | -22.60 % |
| 1998 | 79.06 | -1.18 % |
| 1999 | 96.6 | 22.19 % |
| 2000 | 70.06 | -27.47 % |
| 2001 | 67.5 | -3.65 % |
| 2002 | 55.15 | -18.30 % |
| 2003 | 50.49 | -8.45 % |
| 2004 | 45.58 | -9.72 % |
| 2005 | 40.28 | -11.63 % |
| 2006 | 44.39 | 10.20 % |
Source: United States Energy Information Administration
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