|
| year | production | consumption |
| 1980 | 0 | 14 |
| 1981 | 0 | 12.2 |
| 1982 | 0 | 11.7 |
| 1983 | 0 | 13 |
| 1984 | 0 | 13 |
| 1985 | 0 | 13.72 |
| 1986 | 0 | 14.94 |
| 1987 | 0 | 14.61 |
| 1988 | 0 | 16.19 |
| 1989 | 0 | 15.76 |
| 1990 | 0 | 16.48 |
| 1991 | 0 | 19.16 |
| 1992 | 0 | 22.05 |
| 1993 | 0 | 22.32 |
| 1994 | 0 | 25.27 |
| 1995 | 0 | 31.11 |
| 1996 | 0 | 30.37 |
| 1997 | 0 | 32.16 |
| 1998 | 0 | 37.79 |
| 1999 | 0 | 38.31 |
| 2000 | 0 | 38.06 |
| 2001 | 0 | 39.41 |
| 2002 | 0 | 39.01 |
| 2003 | 0 | 42.36 |
| 2004 | 0 | 41.93 |
| 2005 | 0 | 43.36 |
| 2006 | 0 | 43.8 |
Source: United States Energy Information Administration
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