|
| year | production | consumption |
| 1980 | 0 | 15.6 |
| 1981 | 0 | 14.2 |
| 1982 | 0 | 13.8 |
| 1983 | 0 | 13.8 |
| 1984 | 0 | 12.7 |
| 1985 | 0 | 11.9 |
| 1986 | 0 | 11.89 |
| 1987 | 0 | 12.6 |
| 1988 | 0 | 13.67 |
| 1989 | 0 | 13.38 |
| 1990 | 0 | 13.45 |
| 1991 | 0 | 11.43 |
| 1992 | 0 | 13 |
| 1993 | 0 | 10.85 |
| 1994 | 0 | 10.71 |
| 1995 | 0 | 10.91 |
| 1996 | 0 | 11.09 |
| 1997 | 0 | 11.17 |
| 1998 | 0 | 11.75 |
| 1999 | 0 | 11.16 |
| 2000 | 0 | 10.74 |
| 2001 | 0 | 11.76 |
| 2002 | 0 | 12.19 |
| 2003 | 0 | 12.74 |
| 2004 | 0 | 13.27 |
| 2005 | 0 | 14.07 |
| 2006 | 0 | 14.4 |
Source: United States Energy Information Administration
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