|
| year | production | change |
| 1980 | 66.14 | NA |
| 1981 | 76.06 | 15.00 % |
| 1982 | 68.34 | -10.14 % |
| 1983 | 82.67 | 20.97 % |
| 1984 | 77.16 | -6.67 % |
| 1985 | 62.83 | -18.57 % |
| 1986 | 59.52 | -5.26 % |
| 1987 | 49.60 | -16.67 % |
| 1988 | 46.30 | -6.67 % |
| 1989 | 47.40 | 2.38 % |
| 1990 | 27.56 | -41.86 % |
| 1991 | 1.10 | -96.00 % |
| 1992 | 1.10 | 0.00 % |
| 1993 | 1.10 | 0.00 % |
| 1994 | .05 | -95.50 % |
| 1995 | 1.10 | 2,122.40 % |
| 1996 | 31.97 | 2,800.00 % |
| 1997 | 34.17 | 6.90 % |
| 1998 | 33.07 | -3.23 % |
| 1999 | 34.17 | 3.33 % |
| 2000 | 51.81 | 51.61 % |
| 2001 | 51.81 | 0.00 % |
| 2002 | 60.63 | 17.02 % |
| 2003 | 56.22 | -7.27 % |
| 2004 | 60.63 | 7.84 % |
| 2005 | 60.63 | 0.00 % |
| 2006 | 61.73 | 1.82 % |
| 2007 | 59.52 | -3.57 % |
| 2008 | 65.04 | 9.26 % |
| 2009 | 78.26 | 20.34 % |
| 2010 | 72.75 | -7.04 % |
| 2011 | 67.24 | -7.58 % |
|
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