|
| year | production | consumption |
| 1980 | 0 | 9.9 |
| 1981 | 0 | 9.1 |
| 1982 | 0 | 9 |
| 1983 | 0 | 9.5 |
| 1984 | 0 | 10.4 |
| 1985 | 0 | 10.56 |
| 1986 | 0 | 10.84 |
| 1987 | 0 | 13.75 |
| 1988 | 0 | 12.96 |
| 1989 | 0 | 16.55 |
| 1990 | 0 | 15.85 |
| 1991 | 0 | 14.7 |
| 1992 | 0 | 16.51 |
| 1993 | 0 | 17.68 |
| 1994 | 0 | 20.49 |
| 1995 | 0 | 22.78 |
| 1996 | 0 | 19.19 |
| 1997 | 0 | 20.88 |
| 1998 | 0 | 23.89 |
| 1999 | 0 | 26.94 |
| 2000 | 0 | 25.1 |
| 2001 | 0 | 24.06 |
| 2002 | 0 | 25.05 |
| 2003 | 0 | 26.02 |
| 2004 | 0 | 26.09 |
| 2005 | 0 | 25.81 |
| 2006 | 0 | 26.3 |
Source: United States Energy Information Administration
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