|
| year | production | consumption |
| 1980 | 0 | 12 |
| 1981 | 0 | 12 |
| 1982 | 0 | 13 |
| 1983 | 0 | 15 |
| 1984 | 0 | 15 |
| 1985 | 0 | 18 |
| 1986 | 0 | 17.09 |
| 1987 | 0 | 19.44 |
| 1988 | 0 | 18.69 |
| 1989 | 0 | 19.77 |
| 1990 | 0 | 19.73 |
| 1991 | 0 | 16.43 |
| 1992 | 0 | 23.49 |
| 1993 | 0 | 21.89 |
| 1994 | 0 | 13.98 |
| 1995 | 0 | 15.45 |
| 1996 | 0 | 11.56 |
| 1997 | 0 | 11.59 |
| 1998 | 0 | 17.14 |
| 1999 | 0 | 21.25 |
| 2000 | 0 | 22.73 |
| 2001 | 0 | 23.31 |
| 2002 | 0 | 25.64 |
| 2003 | 0 | 27.55 |
| 2004 | 0 | 28.59 |
| 2005 | 0 | 29.81 |
| 2006 | 0 | 33.4 |
Source: United States Energy Information Administration
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