|
| year | production | change |
| 1980 | .00 | NA |
| 1981 | .00 | 4.61 % |
| 1982 | .00 | 48.43 % |
| 1983 | .00 | 9.32 % |
| 1984 | .00 | 1.94 % |
| 1985 | .00 | 1.14 % |
| 1986 | .00 | 4.51 % |
| 1987 | .00 | 7.19 % |
| 1988 | .00 | 4.03 % |
| 1989 | .00 | 5.81 % |
| 1990 | .00 | 7.32 % |
| 1991 | .00 | -1.70 % |
| 1992 | .00 | 2.31 % |
| 1993 | .00 | 0.28 % |
| 1994 | .00 | 0.85 % |
| 1995 | .00 | 6.42 % |
| 1996 | .00 | 14.17 % |
| 1997 | .00 | 5.75 % |
| 1998 | .01 | 10.87 % |
| 1999 | .01 | 3.33 % |
| 2000 | .01 | 4.55 % |
| 2001 | .01 | -0.91 % |
| 2002 | .01 | -0.37 % |
| 2003 | .01 | 13.79 % |
| 2004 | .01 | 2.58 % |
| 2005 | .01 | 0.94 % |
| 2006 | .01 | -2.34 % |
| 2007 | .01 | 12.46 % |
| 2008 | .01 | -3.13 % |
| 2009 | .01 | 4.99 % |
| 2010 | .01 | -3.07 % |
|
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