|
| year | production | change |
| 1980 | .00 | NA |
| 1981 | .00 | -27.06 % |
| 1982 | .00 | 56.45 % |
| 1983 | .00 | -61.86 % |
| 1984 | .00 | 83.78 % |
| 1985 | .00 | 75.00 % |
| 1986 | .00 | -4.20 % |
| 1987 | .00 | 27.19 % |
| 1988 | .00 | -29.66 % |
| 1989 | .00 | 50.00 % |
| 1990 | .00 | -43.14 % |
| 1991 | .00 | -11.49 % |
| 1992 | .00 | 50.65 % |
| 1993 | .00 | -8.62 % |
| 1994 | .00 | -27.36 % |
| 1995 | .00 | 79.22 % |
| 1996 | .00 | -23.91 % |
| 1997 | .00 | -10.48 % |
| 1998 | .00 | 12.77 % |
| 1999 | .00 | 199.06 % |
| 2000 | .01 | 62.46 % |
| 2001 | .01 | 4.27 % |
| 2002 | .01 | -2.42 % |
| 2003 | .01 | 6.87 % |
| 2004 | .01 | 2.32 % |
| 2005 | .01 | -5.24 % |
| 2006 | .00 | -9.39 % |
| 2007 | .01 | 5.08 % |
| 2008 | .01 | 8.12 % |
| 2009 | .01 | 1.61 % |
| 2010 | .01 | 7.04 % |
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