|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.18 | NA |
| 1987 | .04 | -96.29 % |
| 1988 | 1.03 | 2,242.54 % |
| 1989 | .04 | -95.79 % |
| 1990 | .05 | 6.11 % |
| 1991 | 4.59 | 9,917.78 % |
| 1992 | 5.09 | 10.73 % |
| 1993 | 4.44 | -12.78 % |
| 1994 | 4.50 | 1.46 % |
| 1995 | 4.18 | -7.03 % |
| 1996 | 4.56 | 8.88 % |
| 1997 | 3.94 | -13.57 % |
| 1998 | 4.09 | 3.84 % |
| 1999 | .43 | -89.41 % |
| 2000 | .43 | 0.38 % |
| 2001 | 1.48 | 241.39 % |
| 2002 | 1.67 | 12.57 % |
| 2003 | 1.61 | -3.75 % |
| 2004 | 4.42 | 175.00 % |
| 2005 | 1.32 | -70.08 % |
| 2006 | 1.32 | -0.29 % |
| 2007 | 1.27 | -3.65 % |
| 2008 | 1.68 | 32.50 % |
| 2009 | 1.64 | -2.85 % |
| 2010 | 5.74 | 250.50 % |
|
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