|
| year | production | change |
| 1980 | 686.12 | NA |
| 1981 | 1,036.68 | 51.09 % |
| 1982 | 1,234.60 | 19.09 % |
| 1983 | 1,685.70 | 36.54 % |
| 1984 | 1,800.00 | 6.78 % |
| 1985 | 1,850.00 | 2.78 % |
| 1986 | 1,873.40 | 1.26 % |
| 1987 | 2,101.50 | 12.18 % |
| 1988 | 2,242.14 | 6.69 % |
| 1989 | 2,393.67 | 6.76 % |
| 1990 | 2,454.00 | 2.52 % |
| 1991 | 2,677.87 | 9.12 % |
| 1992 | 2,771.93 | 3.51 % |
| 1993 | 2,804.72 | 1.18 % |
| 1994 | 2,720.65 | -3.00 % |
| 1995 | 3,004.23 | 10.42 % |
| 1996 | 3,223.23 | 7.29 % |
| 1997 | 3,515.61 | 9.07 % |
| 1998 | 3,697.83 | 5.18 % |
| 1999 | 4,014.61 | 8.57 % |
| 2000 | 4,438.04 | 10.55 % |
| 2001 | 4,626.27 | 4.24 % |
| 2002 | 4,680.65 | 1.18 % |
| 2003 | 5,104.78 | 9.06 % |
| 2004 | 5,286.62 | 3.56 % |
| 2005 | 6,154.09 | 16.41 % |
| 2006 | 6,543.48 | 6.33 % |
| 2007 | 6,747.39 | 3.12 % |
| 2008 | 7,387.55 | 9.49 % |
| 2009 | 7,108.89 | -3.77 % |
| 2010 | 7,371.94 | 3.70 % |
| 2011 | 7,122.82 | -3.38 % |
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