|
| year | production | change |
| 1984 | 38.33 | NA |
| 1985 | 34.81 | -9.18 % |
| 1986 | 38.08 | 9.40 % |
| 1987 | 39.94 | 4.87 % |
| 1988 | 41.50 | 3.91 % |
| 1989 | 43.01 | 3.63 % |
| 1990 | 39.23 | -8.79 % |
| 1991 | 36.49 | -6.97 % |
| 1992 | 38.57 | 5.68 % |
| 1993 | 41.68 | 8.09 % |
| 1994 | 40.32 | -3.27 % |
| 1995 | 42.45 | 5.27 % |
| 1996 | 42.20 | -0.58 % |
| 1997 | 30.73 | -27.18 % |
| 1998 | 28.27 | -8.00 % |
| 1999 | 28.84 | 2.02 % |
| 2000 | 30.75 | 6.61 % |
| 2001 | 29.32 | -4.67 % |
| 2002 | 29.97 | 2.23 % |
| 2003 | 27.04 | -9.78 % |
| 2004 | 26.77 | -0.99 % |
| 2005 | 24.82 | -7.30 % |
| 2006 | 25.96 | 4.63 % |
| 2007 | 25.01 | -3.68 % |
| 2008 | 24.28 | -2.90 % |
| 2009 | 22.28 | -8.23 % |
| 2010 | 20.99 | -5.79 % |
|
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