|
| year | production | change |
| 1980 | 367.07 | NA |
| 1981 | 371.48 | 1.20 % |
| 1982 | 622.81 | 67.66 % |
| 1983 | 1,128.77 | 81.24 % |
| 1984 | 1,344.15 | 19.08 % |
| 1985 | 1,395.04 | 3.79 % |
| 1986 | 1,366.32 | -2.06 % |
| 1987 | 1,319.03 | -3.46 % |
| 1988 | 1,475.65 | 11.87 % |
| 1989 | 1,363.57 | -7.60 % |
| 1990 | 1,370.17 | 0.48 % |
| 1991 | 1,394.42 | 1.77 % |
| 1992 | 1,834.25 | 31.54 % |
| 1993 | 1,849.68 | 0.84 % |
| 1994 | 1,597.25 | -13.65 % |
| 1995 | 1,421.98 | -10.97 % |
| 1996 | 1,221.36 | -14.11 % |
| 1997 | 1,189.39 | -2.62 % |
| 1998 | 1,101.21 | -7.41 % |
| 1999 | 1,103.41 | 0.20 % |
| 2000 | 1,492.53 | 35.26 % |
| 2001 | 1,359.15 | -8.94 % |
| 2002 | 1,678.82 | 23.52 % |
| 2003 | 2,205.73 | 31.39 % |
| 2004 | 2,737.04 | 24.09 % |
| 2005 | 3,174.66 | 15.99 % |
| 2006 | 2,597.05 | -18.19 % |
| 2007 | 3,741.25 | 44.06 % |
| 2008 | 3,978.24 | 6.33 % |
| 2009 | 5,166.53 | 29.87 % |
| 2010 | 7,330.37 | 41.88 % |
| 2011 | 10,400.31 | 41.88 % |
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