|
| year | production | change |
| 1984 | 15.18 | NA |
| 1985 | 16.30 | 7.38 % |
| 1986 | 12.65 | -22.40 % |
| 1987 | 12.14 | -4.03 % |
| 1988 | 12.33 | 1.53 % |
| 1989 | 13.02 | 5.68 % |
| 1990 | 12.58 | -3.39 % |
| 1991 | 14.59 | 15.94 % |
| 1992 | 15.46 | 6.00 % |
| 1993 | 16.84 | 8.92 % |
| 1994 | 18.78 | 11.52 % |
| 1995 | 21.45 | 14.22 % |
| 1996 | 25.57 | 19.20 % |
| 1997 | 28.44 | 11.21 % |
| 1998 | 26.38 | -7.25 % |
| 1999 | 30.54 | 15.78 % |
| 2000 | 29.32 | -4.00 % |
| 2001 | 30.89 | 5.38 % |
| 2002 | 29.55 | -4.34 % |
| 2003 | 25.90 | -12.37 % |
| 2004 | 13.28 | -48.73 % |
| 2005 | 19.86 | 49.59 % |
| 2006 | 21.96 | 10.55 % |
| 2007 | 22.53 | 2.60 % |
| 2008 | 29.25 | 29.84 % |
| 2009 | 18.15 | -37.96 % |
| 2010 | 22.88 | 26.09 % |
|
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