|
| year | production | change |
| 1980 | 6.00 | NA |
| 1981 | 6.00 | 0.00 % |
| 1982 | 6.00 | 0.00 % |
| 1983 | 4.00 | -33.33 % |
| 1984 | 4.00 | 0.00 % |
| 1985 | 4.00 | 0.00 % |
| 1986 | 5.00 | 25.00 % |
| 1987 | 6.00 | 20.00 % |
| 1988 | 4.00 | -33.33 % |
| 1989 | 8.00 | 100.00 % |
| 1990 | 8.00 | 0.00 % |
| 1991 | 6.00 | -25.00 % |
| 1992 | 5.67 | -5.50 % |
| 1993 | 5.00 | -11.82 % |
| 1994 | 5.00 | 0.00 % |
| 1995 | 4.70 | -6.00 % |
| 1996 | 10.00 | 112.77 % |
| 1997 | 4.30 | -57.00 % |
| 1998 | 4.40 | 2.33 % |
| 1999 | 4.80 | 9.09 % |
| 2000 | 3.70 | -22.92 % |
| 2001 | 1.62 | -56.22 % |
| 2002 | 2.00 | 23.46 % |
| 2003 | 3.81 | 90.50 % |
| 2004 | 4.00 | 4.99 % |
| 2005 | 4.00 | 0.00 % |
| 2006 | 3.91 | -2.25 % |
|
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