|
| year | production | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | 1.80 | NA |
| 1991 | 1.70 | -5.56 % |
| 1992 | 1.60 | -5.88 % |
| 1993 | 1.20 | -25.00 % |
| 1994 | 1.20 | 0.00 % |
| 1995 | 1.10 | -8.33 % |
| 1996 | 1.10 | 0.00 % |
| 1997 | 1.10 | 0.00 % |
| 1998 | .90 | -18.18 % |
| 1999 | .90 | 0.00 % |
| 2000 | 1.10 | 22.22 % |
| 2001 | | NA |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | .80 | NA |
| 2006 | .50 | -37.50 % |
| 2007 | .40 | -20.00 % |
| 2008 | .30 | -25.00 % |
| 2009 | .30 | 0.00 % |
| 2010 | .30 | 0.00 % |
| 2011 | .50 | 66.67 % |
|
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