|
| year | production | change |
| 1980 | .35 | NA |
| 1981 | .57 | 62.86 % |
| 1982 | .58 | 1.75 % |
| 1983 | .63 | 8.62 % |
| 1984 | .53 | -15.87 % |
| 1985 | .43 | -18.87 % |
| 1986 | .38 | -11.63 % |
| 1987 | .43 | 13.16 % |
| 1988 | .43 | 0.00 % |
| 1989 | .44 | 2.33 % |
| 1990 | .42 | -4.55 % |
| 1991 | .42 | 0.00 % |
| 1992 | .40 | -4.76 % |
| 1993 | .38 | -5.00 % |
| 1994 | .39 | 2.63 % |
| 1995 | .43 | 10.26 % |
| 1996 | .43 | 0.00 % |
| 1997 | .48 | 11.63 % |
| 1998 | .45 | -6.25 % |
| 1999 | .59 | 31.11 % |
| 2000 | .77 | 30.51 % |
| 2001 | .94 | 22.08 % |
| 2002 | .96 | 2.13 % |
| 2003 | .99 | 3.13 % |
| 2004 | .98 | -1.01 % |
| 2005 | 1.02 | 4.08 % |
| 2006 | 1.10 | 7.84 % |
|
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