|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.56 | NA |
| 1987 | 4.68 | 2.55 % |
| 1988 | 4.74 | 1.31 % |
| 1989 | 4.62 | -2.55 % |
| 1990 | 4.02 | -12.85 % |
| 1991 | 4.11 | 2.03 % |
| 1992 | 4.51 | 9.98 % |
| 1993 | 4.37 | -3.28 % |
| 1994 | 4.31 | -1.27 % |
| 1995 | 3.54 | -18.00 % |
| 1996 | 5.60 | 58.32 % |
| 1997 | 6.60 | 17.91 % |
| 1998 | 7.89 | 19.48 % |
| 1999 | 6.67 | -15.47 % |
| 2000 | 7.15 | 7.28 % |
| 2001 | 6.58 | -7.92 % |
| 2002 | 6.58 | -0.09 % |
| 2003 | 6.55 | -0.48 % |
| 2004 | 7.35 | 12.20 % |
| 2005 | 7.15 | -2.65 % |
| 2006 | 24.69 | 245.33 % |
| 2007 | 6.32 | -74.39 % |
| 2008 | 6.58 | 4.02 % |
| 2009 | 5.82 | -11.59 % |
| 2010 | 6.48 | 11.48 % |
|
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