|
| year | production | change |
| 1980 | 5.00 | NA |
| 1981 | 4.00 | -20.00 % |
| 1982 | 6.00 | 50.00 % |
| 1983 | 6.00 | 0.00 % |
| 1984 | 6.00 | 0.00 % |
| 1985 | 6.00 | 0.00 % |
| 1986 | 5.00 | -16.67 % |
| 1987 | 4.00 | -20.00 % |
| 1988 | 5.00 | 25.00 % |
| 1989 | 5.00 | 0.00 % |
| 1990 | 5.00 | 0.00 % |
| 1991 | 5.00 | 0.00 % |
| 1992 | 7.08 | 41.60 % |
| 1993 | 7.07 | -0.14 % |
| 1994 | 7.47 | 5.66 % |
| 1995 | 6.30 | -15.66 % |
| 1996 | 6.73 | 6.83 % |
| 1997 | 8.27 | 22.88 % |
| 1998 | 8.62 | 4.23 % |
| 1999 | 8.36 | -3.02 % |
| 2000 | 9.47 | 13.28 % |
| 2001 | 9.53 | 0.63 % |
| 2002 | 14.04 | 47.32 % |
| 2003 | 12.38 | -11.82 % |
| 2004 | 12.38 | 0.00 % |
| 2005 | 10.62 | -14.22 % |
| 2006 | 10.76 | 1.32 % |
|
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