|
| year | production | change |
| 1980 | 1,421.98 | NA |
| 1981 | 1,342.62 | -5.58 % |
| 1982 | 2,104.31 | 56.73 % |
| 1983 | 1,933.45 | -8.12 % |
| 1984 | 1,968.73 | 1.82 % |
| 1985 | 2,104.31 | 6.89 % |
| 1986 | 1,124.36 | -46.57 % |
| 1987 | 1,072.55 | -4.61 % |
| 1988 | 1,146.40 | 6.89 % |
| 1989 | 1,183.88 | 3.27 % |
| 1990 | 1,117.74 | -5.59 % |
| 1991 | 1,059.32 | -5.23 % |
| 1992 | 909.41 | -14.15 % |
| 1993 | 694.46 | -23.64 % |
| 1994 | 299.83 | -56.83 % |
| 1995 | 189.60 | -36.76 % |
| 1996 | 151.02 | -20.35 % |
| 1997 | 238.10 | 57.66 % |
| 1998 | 208.34 | -12.50 % |
| 1999 | 126.77 | -39.15 % |
| 2000 | 15.43 | -87.83 % |
| 2001 | 153.22 | 892.86 % |
| 2002 | 179.68 | 17.27 % |
| 2003 | 275.58 | 53.37 % |
| 2004 | 108.03 | -60.80 % |
| 2005 | 104.72 | -3.06 % |
| 2006 | 23.15 | -77.89 % |
| 2007 | 174.17 | 652.38 % |
| 2008 | 128.97 | -25.95 % |
| 2009 | 79.37 | -38.46 % |
| 2010 | 111.33 | 40.28 % |
| 2011 | 101.41 | -8.91 % |
|
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