|
| year | production | change |
| 1980 | .31 | NA |
| 1981 | .32 | 3.23 % |
| 1982 | .51 | 59.38 % |
| 1983 | .53 | 3.92 % |
| 1984 | .76 | 43.40 % |
| 1985 | .88 | 15.79 % |
| 1986 | .92 | 4.55 % |
| 1987 | .86 | -6.52 % |
| 1988 | 1.00 | 16.28 % |
| 1989 | 1.05 | 5.00 % |
| 1990 | 1.11 | 5.71 % |
| 1991 | 1.19 | 7.21 % |
| 1992 | 1.30 | 9.24 % |
| 1993 | 1.33 | 2.31 % |
| 1994 | 1.19 | -10.53 % |
| 1995 | 1.81 | 52.10 % |
| 1996 | 1.72 | -4.97 % |
| 1997 | 1.76 | 2.33 % |
| 1998 | 1.86 | 5.68 % |
| 1999 | 1.89 | 1.61 % |
| 2000 | 1.75 | -7.41 % |
| 2001 | 1.98 | 13.14 % |
| 2002 | 1.98 | 0.00 % |
| 2003 | 2.28 | 15.15 % |
| 2004 | 3.11 | 36.40 % |
| 2005 | 3.73 | 19.94 % |
| 2006 | 4.90 | 31.37 % |
|
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