|
| year | production | change |
| 1980 | 15.00 | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | 13.00 | NA |
| 1984 | 12.00 | -7.69 % |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | 4.70 | NA |
| 1991 | | NA |
| 1992 | 8.05 | NA |
| 1993 | 9.10 | 13.09 % |
| 1994 | 6.10 | -32.96 % |
| 1995 | 3.40 | -44.26 % |
| 1996 | | NA |
| 1997 | | NA |
| 1998 | .79 | NA |
| 1999 | .86 | 8.73 % |
| 2000 | 1.14 | 33.18 % |
| 2001 | 8.46 | 639.53 % |
| 2002 | 9.85 | 16.45 % |
| 2003 | 13.78 | 39.88 % |
| 2004 | 25.00 | 81.41 % |
| 2005 | 25.00 | 0.00 % |
| 2006 | 25.00 | 0.00 % |
| 2007 | 24.62 | -1.51 % |
| 2008 | 24.55 | -0.29 % |
| 2009 | 24.40 | -0.62 % |
| 2010 | 32.95 | 35.03 % |
| 2011 | 26.64 | -19.13 % |
| 2012 | 19.99 | -24.96 % |
|
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