|
| year | production | change |
| 1980 | .00 | NA |
| 1981 | .00 | 0.65 % |
| 1982 | .00 | 0.00 % |
| 1983 | .00 | 3.87 % |
| 1984 | .00 | 0.62 % |
| 1985 | .00 | 3.70 % |
| 1986 | .00 | 1.19 % |
| 1987 | .00 | 1.18 % |
| 1988 | .00 | 0.58 % |
| 1989 | .00 | 2.31 % |
| 1990 | .00 | 1.69 % |
| 1991 | .00 | 2.22 % |
| 1992 | .00 | 0.00 % |
| 1993 | .00 | 1.09 % |
| 1994 | .00 | 1.08 % |
| 1995 | .00 | 4.79 % |
| 1996 | .00 | 2.54 % |
| 1997 | .00 | 44.06 % |
| 1998 | .00 | 7.56 % |
| 1999 | .00 | 27.80 % |
| 2000 | .00 | 3.50 % |
| 2001 | .01 | 36.23 % |
| 2002 | .01 | 6.21 % |
| 2003 | .00 | -32.22 % |
| 2004 | .01 | 35.47 % |
| 2005 | .00 | -11.09 % |
| 2006 | .00 | -7.57 % |
| 2007 | .01 | 16.59 % |
| 2008 | .01 | -2.09 % |
| 2009 | .01 | -2.13 % |
| 2010 | .01 | 0.20 % |
|
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