|
| year | production | change |
| 1980 | 1.24 | NA |
| 1981 | 1.80 | 45.16 % |
| 1982 | 2.03 | 12.78 % |
| 1983 | 1.98 | -2.46 % |
| 1984 | 2.22 | 12.12 % |
| 1985 | 1.60 | -27.93 % |
| 1986 | 1.78 | 11.25 % |
| 1987 | 2.20 | 23.60 % |
| 1988 | 2.37 | 7.73 % |
| 1989 | 3.31 | 39.66 % |
| 1990 | 3.70 | 11.78 % |
| 1991 | 3.73 | 0.81 % |
| 1992 | 4.18 | 12.06 % |
| 1993 | 4.53 | 8.37 % |
| 1994 | 5.43 | 19.87 % |
| 1995 | 5.34 | -1.66 % |
| 1996 | 5.53 | 3.56 % |
| 1997 | 6.52 | 17.90 % |
| 1998 | 6.93 | 6.29 % |
| 1999 | 7.96 | 14.86 % |
| 2000 | 7.98 | 0.25 % |
| 2001 | 8.42 | 5.51 % |
| 2002 | 8.91 | 5.82 % |
| 2003 | 9.32 | 4.60 % |
| 2004 | 9.20 | -1.29 % |
| 2005 | 10.04 | 9.13 % |
| 2006 | 11.03 | 9.86 % |
|
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