|
| year | production | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | .10 | NA |
| 1993 | .10 | -0.06 % |
| 1994 | .10 | -0.35 % |
| 1995 | .09 | -2.65 % |
| 1996 | .09 | -4.62 % |
| 1997 | .09 | -4.33 % |
| 1998 | .09 | 1.17 % |
| 1999 | .09 | -0.03 % |
| 2000 | .09 | 0.83 % |
| 2001 | .09 | -0.25 % |
| 2002 | .09 | -1.67 % |
| 2003 | .08 | -1.54 % |
| 2004 | .09 | 1.02 % |
| 2005 | .08 | -3.58 % |
| 2006 | .08 | 0.66 % |
| 2007 | .08 | -0.51 % |
| 2008 | .08 | -0.15 % |
| 2009 | .08 | -4.79 % |
| 2010 | .07 | -4.11 % |
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