|
| 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 | 2.34 | NA |
| 1993 | 2.58 | 10.16 % |
| 1994 | 1.49 | -42.15 % |
| 1995 | 1.36 | -8.87 % |
| 1996 | 1.55 | 13.82 % |
| 1997 | 1.16 | -25.15 % |
| 1998 | .75 | -35.33 % |
| 1999 | 1.15 | 52.99 % |
| 2000 | 2.05 | 78.47 % |
| 2001 | 2.13 | 4.16 % |
| 2002 | 2.38 | 11.66 % |
| 2003 | 2.61 | 9.40 % |
| 2004 | 2.62 | 0.42 % |
| 2005 | 2.66 | 1.81 % |
| 2006 | 2.63 | -1.35 % |
| 2007 | 2.84 | 7.95 % |
| 2008 | 2.91 | 2.71 % |
| 2009 | 1.77 | -39.15 % |
| 2010 | 2.04 | 14.84 % |
|
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