|
| year | production | change |
| 1980 | 9900 | NA |
| 1981 | 9815 | -0.86 % |
| 1982 | 6483 | -33.95 % |
| 1983 | 5086 | -21.55 % |
| 1984 | 4663 | -8.32 % |
| 1985 | 3388 | -27.34 % |
| 1986 | 4870 | 43.74 % |
| 1987 | 4265 | -12.42 % |
| 1988 | 5086 | 19.25 % |
| 1989 | 5064 | -0.43 % |
| 1990 | 6410 | 26.58 % |
| 1991 | 8115 | 26.60 % |
| 1992 | 8331.7 | 2.67 % |
| 1993 | 8197.81 | -1.61 % |
| 1994 | 8120 | -0.95 % |
| 1995 | 8231.23 | 1.37 % |
| 1996 | 8218.08 | -0.16 % |
| 1997 | 8362.03 | 1.75 % |
| 1998 | 8388.9 | 0.32 % |
| 1999 | 7833.39 | -6.62 % |
| 2000 | 8403.8 | 7.28 % |
| 2001 | 8031.1 | -4.43 % |
| 2002 | 7634.4 | -4.94 % |
| 2003 | 8775 | 14.94 % |
| 2004 | 9100.82 | 3.71 % |
| 2005 | 9550.14 | 4.94 % |
| 2006 | 9152.33 | -4.17 % |
Source: United States Energy Information Administration
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