|
| year | production | change |
| 1980 | 63.90 | NA |
| 1981 | 71.80 | 12.36 % |
| 1982 | 100.70 | 40.25 % |
| 1983 | 135.80 | 34.86 % |
| 1984 | 194.30 | 43.08 % |
| 1985 | 203.90 | 4.94 % |
| 1986 | 181.40 | -11.03 % |
| 1987 | 197.90 | 9.10 % |
| 1988 | 202.20 | 2.17 % |
| 1989 | 205.60 | 1.68 % |
| 1990 | 203.50 | -1.02 % |
| 1991 | 220.32 | 8.26 % |
| 1992 | 202.81 | -7.95 % |
| 1993 | 195.58 | -3.57 % |
| 1994 | 216.03 | 10.46 % |
| 1995 | 219.94 | 1.81 % |
| 1996 | 243.19 | 10.57 % |
| 1997 | 267.09 | 9.83 % |
| 1998 | 243.46 | -8.85 % |
| 1999 | 223.91 | -8.03 % |
| 2000 | 183.93 | -17.86 % |
| 2001 | 197.61 | 7.44 % |
| 2002 | 216.95 | 9.79 % |
| 2003 | 249.37 | 14.94 % |
| 2004 | 251.82 | 0.98 % |
| 2005 | 277.51 | 10.20 % |
| 2006 | 311.62 | 12.29 % |
| 2007 | 394.51 | 26.60 % |
| 2008 | 472.89 | 19.87 % |
| 2009 | 457.96 | -3.16 % |
| 2010 | 497.11 | 8.55 % |
| 2011 | 396.60 | -20.22 % |
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