|
| year | production | change |
| 1980 | 0.04 | NA |
| 1981 | 0.047 | 17.50 % |
| 1982 | 0.081 | 72.34 % |
| 1983 | 0.086 | 6.17 % |
| 1984 | 0.106 | 23.26 % |
| 1985 | 0.133 | 25.47 % |
| 1986 | 0.159 | 19.55 % |
| 1987 | 0.152 | -4.40 % |
| 1988 | 0.166 | 9.21 % |
| 1989 | 0.17 | 2.41 % |
| 1990 | 0.169 | -0.59 % |
| 1991 | 0.186 | 10.06 % |
| 1992 | 0.197 | 5.91 % |
| 1993 | 0.175 | -11.17 % |
| 1994 | 0.176 | 0.57 % |
| 1995 | 0.166 | -5.68 % |
| 1996 | 0.188 | 13.25 % |
| 1997 | 0.2 | 6.38 % |
| 1998 | 0.175 | -12.50 % |
| 1999 | 0.202 | 15.43 % |
| 2000 | 0.214 | 5.94 % |
| 2001 | 0.226 | 5.61 % |
| 2002 | 0.215 | -4.87 % |
| 2003 | 0.164 | -23.72 % |
| 2004 | 0.15 | -8.54 % |
| 2005 | 0.141 | -6.00 % |
| 2006 | 0.145 | 2.84 % |
Source: United States Energy Information Administration
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