|
| year | production | change |
| 1980 | 74.69 | NA |
| 1981 | 50.75 | -32.06 % |
| 1982 | 46.79 | -7.79 % |
| 1983 | 42.87 | -8.38 % |
| 1984 | 44.96 | 4.86 % |
| 1985 | 41.21 | -8.33 % |
| 1986 | 39.38 | -4.46 % |
| 1987 | 41.00 | 4.13 % |
| 1988 | 44.43 | 8.35 % |
| 1989 | 46.72 | 5.17 % |
| 1990 | 45.00 | -3.69 % |
| 1991 | 47.00 | 4.44 % |
| 1992 | 51.00 | 8.51 % |
| 1993 | 53.00 | 3.92 % |
| 1994 | 47.85 | -9.72 % |
| 1995 | 52.34 | 9.38 % |
| 1996 | 52.69 | 0.67 % |
| 1997 | 50.43 | -4.29 % |
| 1998 | 55.37 | 9.80 % |
| 1999 | 61.45 | 10.97 % |
| 2000 | 63.74 | 3.74 % |
| 2001 | 61.17 | -4.04 % |
| 2002 | 66.39 | 8.55 % |
| 2003 | 73.84 | 11.22 % |
| 2004 | 69.32 | -6.12 % |
| 2005 | 57.81 | -16.61 % |
| 2006 | 64.24 | 11.12 % |
| 2007 | 68.86 | 7.20 % |
| 2008 | 57.07 | -17.13 % |
| 2009 | 62.12 | 8.85 % |
| 2010 | 63.92 | 2.90 % |
| 2011 | 62.72 | -1.88 % |
|
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