|
| year | production | change |
| 1980 | 6.00 | NA |
| 1981 | 7.00 | 16.67 % |
| 1982 | 8.00 | 14.29 % |
| 1983 | 11.00 | 37.50 % |
| 1984 | 15.00 | 36.36 % |
| 1985 | 17.00 | 13.33 % |
| 1986 | 20.00 | 17.65 % |
| 1987 | 25.00 | 25.00 % |
| 1988 | 25.00 | 0.00 % |
| 1989 | 22.00 | -12.00 % |
| 1990 | 20.00 | -9.09 % |
| 1991 | 22.00 | 10.00 % |
| 1992 | 25.00 | 13.64 % |
| 1993 | 25.00 | 0.00 % |
| 1994 | 35.00 | 40.00 % |
| 1995 | 40.00 | 14.29 % |
| 1996 | 35.00 | -12.50 % |
| 1997 | 30.00 | -14.29 % |
| 1998 | 35.00 | 16.67 % |
| 1999 | 33.00 | -5.71 % |
| 2000 | 36.00 | 9.09 % |
| 2001 | 41.00 | 13.89 % |
| 2002 | 45.00 | 9.76 % |
| 2003 | 55.00 | 22.22 % |
| 2004 | 61.54 | 11.89 % |
| 2005 | 79.30 | 28.86 % |
| 2006 | 86.39 | 8.94 % |
|
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