|
| year | production | change |
| 1984 | 22.79 | NA |
| 1985 | 23.10 | 1.38 % |
| 1986 | 24.03 | 4.01 % |
| 1987 | 24.10 | 0.29 % |
| 1988 | 23.02 | -4.47 % |
| 1989 | 16.83 | -26.88 % |
| 1990 | 17.59 | 4.52 % |
| 1991 | 26.74 | 51.98 % |
| 1992 | 22.79 | -14.78 % |
| 1993 | 25.09 | 10.12 % |
| 1994 | 25.38 | 1.15 % |
| 1995 | 24.01 | -5.40 % |
| 1996 | 26.11 | 8.75 % |
| 1997 | 27.39 | 4.89 % |
| 1998 | 28.04 | 2.36 % |
| 1999 | 29.06 | 3.65 % |
| 2000 | 24.66 | -15.15 % |
| 2001 | 26.86 | 8.94 % |
| 2002 | 27.23 | 1.38 % |
| 2003 | 24.86 | -8.69 % |
| 2004 | 31.42 | 26.39 % |
| 2005 | 29.35 | -6.60 % |
| 2006 | 33.92 | 15.56 % |
| 2007 | 29.66 | -12.56 % |
| 2008 | 31.61 | 6.58 % |
| 2009 | 33.04 | 4.52 % |
| 2010 | 30.58 | -7.43 % |
|
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