|
| year | production | change |
| 1980 | 228.18 | NA |
| 1981 | 363.76 | 59.42 % |
| 1982 | 221.56 | -39.09 % |
| 1983 | 63.93 | -71.14 % |
| 1984 | 44.09 | -31.03 % |
| 1985 | 38.58 | -12.50 % |
| 1986 | 44.09 | 14.29 % |
| 1987 | 47.40 | 7.50 % |
| 1988 | 49.60 | 4.65 % |
| 1989 | 46.30 | -6.67 % |
| 1990 | 44.09 | -4.76 % |
| 1991 | 46.30 | 5.00 % |
| 1992 | 44.09 | -4.76 % |
| 1993 | 44.09 | 0.00 % |
| 1994 | 44.09 | 0.00 % |
| 1995 | 41.89 | -5.00 % |
| 1996 | 22.05 | -47.37 % |
| 1997 | 19.84 | -10.00 % |
| 1998 | 19.84 | 0.00 % |
| 1999 | 18.74 | -5.56 % |
| 2000 | 17.64 | -5.88 % |
| 2001 | 30.86 | 75.00 % |
| 2002 | 48.50 | 57.14 % |
| 2003 | 40.79 | -15.91 % |
| 2004 | 18.74 | -54.05 % |
| 2005 | 3.31 | -82.35 % |
| 2006 | 45.19 | 1,266.67 % |
| 2007 | 26.46 | -41.46 % |
| 2008 | 41.89 | 58.33 % |
| 2009 | 41.89 | 0.00 % |
| 2010 | 41.89 | 0.00 % |
| 2011 | 41.89 | 0.00 % |
|
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