|
| year | production | change |
| 1980 | .00 | NA |
| 1981 | .00 | -0.93 % |
| 1982 | .00 | -1.87 % |
| 1983 | .00 | 27.30 % |
| 1984 | .00 | 5.74 % |
| 1985 | .00 | 2.59 % |
| 1986 | .00 | 8.51 % |
| 1987 | .00 | -4.45 % |
| 1988 | .00 | 0.67 % |
| 1989 | .00 | 3.30 % |
| 1990 | .00 | 0.85 % |
| 1991 | .01 | 9.09 % |
| 1992 | .12 | 2,142.05 % |
| 1993 | .27 | 129.29 % |
| 1994 | .23 | -12.64 % |
| 1995 | .22 | -6.25 % |
| 1996 | .23 | 4.30 % |
| 1997 | .17 | -22.78 % |
| 1998 | .17 | -0.19 % |
| 1999 | .21 | 20.87 % |
| 2000 | .16 | -25.50 % |
| 2001 | .15 | -3.50 % |
| 2002 | .13 | -16.75 % |
| 2003 | .12 | -6.22 % |
| 2004 | .11 | -8.75 % |
| 2005 | .10 | -9.38 % |
| 2006 | .11 | 9.72 % |
| 2007 | .10 | -3.83 % |
| 2008 | .10 | -7.85 % |
| 2009 | .09 | -8.52 % |
| 2010 | .08 | -10.03 % |
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