|
| year | production | change |
| 1980 | 0.043 | NA |
| 1981 | 0.053 | 23.26 % |
| 1982 | 0.047 | -11.32 % |
| 1983 | 0.047 | 0.00 % |
| 1984 | 0.052 | 10.64 % |
| 1985 | 0.05 | -3.85 % |
| 1986 | 0.04 | -20.00 % |
| 1987 | 0.043 | 7.50 % |
| 1988 | 0.024 | -44.19 % |
| 1989 | 0.05 | 108.33 % |
| 1990 | 0.08 | 60.00 % |
| 1991 | 0.034 | -57.50 % |
| 1992 | 0.031 | -8.82 % |
| 1993 | 0.029 | -6.45 % |
| 1994 | 0.032 | 10.34 % |
| 1995 | 0.034 | 6.25 % |
| 1996 | 0.032 | -5.88 % |
| 1997 | 0.033 | 3.12 % |
| 1998 | 0.031 | -6.06 % |
| 1999 | 0.031 | 0.00 % |
| 2000 | 0.031 | 0.00 % |
| 2001 | 0.03 | -3.23 % |
| 2002 | 0.033 | 10.00 % |
| 2003 | 0.029 | -12.12 % |
| 2004 | 0.03 | 3.45 % |
| 2005 | 0.028 | -6.67 % |
| 2006 | 0.015 | -46.43 % |
Source: United States Energy Information Administration
|
