|
| year | production | change |
| 1980 | 380 | NA |
| 1981 | 394 | 3.68 % |
| 1982 | 370 | -6.09 % |
| 1983 | 416 | 12.43 % |
| 1984 | 492 | 18.27 % |
| 1985 | 575 | 16.87 % |
| 1986 | 520 | -9.57 % |
| 1987 | 547 | 5.19 % |
| 1988 | 538 | -1.65 % |
| 1989 | 490 | -8.92 % |
| 1990 | 575 | 17.35 % |
| 1991 | 545 | -5.22 % |
| 1992 | 534.61 | -1.91 % |
| 1993 | 503 | -5.91 % |
| 1994 | 536.38 | 6.64 % |
| 1995 | 561.79 | 4.74 % |
| 1996 | 569.63 | 1.40 % |
| 1997 | 587.69 | 3.17 % |
| 1998 | 543.97 | -7.44 % |
| 1999 | 538.98 | -0.92 % |
| 2000 | 721.57 | 33.88 % |
| 2001 | 657 | -8.95 % |
| 2002 | 625.97 | -4.72 % |
| 2003 | 512.16 | -18.18 % |
| 2004 | 435.96 | -14.88 % |
| 2005 | 445.57 | 2.20 % |
| 2006 | 429.25 | -3.66 % |
Source: United States Energy Information Administration
|
