|
| year | production | change |
| 1980 | 5,732.02 | NA |
| 1981 | 6,613.87 | 15.38 % |
| 1982 | 6,922.52 | 4.67 % |
| 1983 | 6,944.56 | 0.32 % |
| 1984 | 5,511.56 | -20.63 % |
| 1985 | 6,166.33 | 11.88 % |
| 1986 | 6,748.35 | 9.44 % |
| 1987 | 6,979.84 | 3.43 % |
| 1988 | 6,678.90 | -4.31 % |
| 1989 | 5,661.47 | -15.23 % |
| 1990 | 5,112.52 | -9.70 % |
| 1991 | 5,612.97 | 9.79 % |
| 1992 | 5,511.56 | -1.81 % |
| 1993 | 6,503.64 | 18.00 % |
| 1994 | 6,283.18 | -3.39 % |
| 1995 | 9,204.30 | 46.49 % |
| 1996 | 10,828.00 | 17.64 % |
| 1997 | 12,553.12 | 15.93 % |
| 1998 | 12,866.18 | 2.49 % |
| 1999 | 10,614.16 | -17.50 % |
| 2000 | 12,796.73 | 20.56 % |
| 2001 | 14,288.16 | 11.65 % |
| 2002 | 17,526.75 | 22.67 % |
| 2003 | 18,408.60 | 5.03 % |
| 2004 | 28,108.94 | 52.69 % |
| 2005 | 36,065.42 | 28.31 % |
| 2006 | 43,528.07 | 20.69 % |
| 2007 | 47,596.70 | 9.35 % |
| 2008 | 45,438.38 | -4.53 % |
| 2009 | 48,443.28 | 6.61 % |
| 2010 | 49,232.53 | 1.63 % |
| 2011 | 49,079.31 | -0.31 % |
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