|
| year | production | consumption |
| 1980 | 2 | 16 |
| 1981 | 2 | 14 |
| 1982 | 2 | 16 |
| 1983 | 2 | 14 |
| 1984 | 2 | 16 |
| 1985 | 1 | 13.71 |
| 1986 | 0.3 | 15.9 |
| 1987 | 0 | 18.12 |
| 1988 | 0 | 21.3 |
| 1989 | 0 | 23.66 |
| 1990 | 0 | 20 |
| 1991 | 0 | 20.13 |
| 1992 | 1.09 | 22.44 |
| 1993 | 1.6 | 23.43 |
| 1994 | 1.4 | 25.81 |
| 1995 | 4 | 26.66 |
| 1996 | 6 | 27.18 |
| 1997 | 5 | 26.02 |
| 1998 | 5 | 26.79 |
| 1999 | 6 | 31.36 |
| 2000 | 7 | 36.96 |
| 2001 | 7 | 36.27 |
| 2002 | 7 | 38.65 |
| 2003 | 7 | 41.54 |
| 2004 | 7 | 45.3 |
| 2005 | 6 | 45.95 |
| 2006 | 6 | 51.3 |
Source: United States Energy Information Administration
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