|
| year | production | change |
| 1980 | 58 | NA |
| 1981 | 87 | 50.00 % |
| 1982 | 109 | 25.29 % |
| 1983 | 114 | 4.59 % |
| 1984 | 135 | 18.42 % |
| 1985 | 185 | 37.04 % |
| 1986 | 177 | -4.32 % |
| 1987 | 174 | -1.69 % |
| 1988 | 163 | -6.32 % |
| 1989 | 170 | 4.29 % |
| 1990 | 161 | -5.29 % |
| 1991 | 153.29 | -4.79 % |
| 1992 | 140.36 | -8.43 % |
| 1993 | 126.86 | -9.62 % |
| 1994 | 107.94 | -14.91 % |
| 1995 | 111 | 2.83 % |
| 1996 | 108 | -2.70 % |
| 1997 | 124 | 14.81 % |
| 1998 | 120.5 | -2.82 % |
| 1999 | 100 | -17.01 % |
| 2000 | 84.82 | -15.18 % |
| 2001 | 76.65 | -9.63 % |
| 2002 | 69.82 | -8.91 % |
| 2003 | 67 | -4.04 % |
| 2004 | 65.99 | -1.51 % |
| 2005 | 82.32 | 24.75 % |
| 2006 | 86.4 | 4.96 % |
Source: United States Energy Information Administration
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