|
| year | production | change |
| 1980 | 5,778.32 | NA |
| 1981 | 6,271.05 | 8.53 % |
| 1982 | 6,995.27 | 11.55 % |
| 1983 | 7,426.27 | 6.16 % |
| 1984 | 8,288.28 | 11.61 % |
| 1985 | 8,501.03 | 2.57 % |
| 1986 | 8,147.18 | -4.16 % |
| 1987 | 7,588.31 | -6.86 % |
| 1988 | 8,081.04 | 6.49 % |
| 1989 | 7,353.52 | -9.00 % |
| 1990 | 5,065.12 | -31.12 % |
| 1991 | 5,718.79 | 12.91 % |
| 1992 | 5,215.04 | -8.81 % |
| 1993 | 5,065.12 | -2.87 % |
| 1994 | 5,659.27 | 11.73 % |
| 1995 | 5,730.92 | 1.27 % |
| 1996 | 5,296.61 | -7.58 % |
| 1997 | 6,224.75 | 17.52 % |
| 1998 | 6,080.35 | -2.32 % |
| 1999 | 6,239.08 | 2.61 % |
| 2000 | 7,502.33 | 20.25 % |
| 2001 | 6,232.47 | -16.93 % |
| 2002 | 5,670.29 | -9.02 % |
| 2003 | 5,121.34 | -9.68 % |
| 2004 | 5,959.10 | 16.36 % |
| 2005 | 6,894.96 | 15.70 % |
| 2006 | 6,494.82 | -5.80 % |
| 2007 | 6,575.29 | 1.24 % |
| 2008 | 7,288.48 | 10.85 % |
| 2009 | 6,293.10 | -13.66 % |
| 2010 | 5,969.02 | -5.15 % |
| 2011 | 6,005.39 | 0.61 % |
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