|
| year | production | change |
| 1984 | 8.07 | NA |
| 1985 | 8.41 | 4.21 % |
| 1986 | 10.17 | 20.91 % |
| 1987 | 9.66 | -5.01 % |
| 1988 | 8.48 | -12.26 % |
| 1989 | 8.85 | 4.44 % |
| 1990 | 10.96 | 23.76 % |
| 1991 | 11.35 | 3.57 % |
| 1992 | 12.23 | 7.77 % |
| 1993 | 12.04 | -1.61 % |
| 1994 | 14.52 | 20.62 % |
| 1995 | 13.88 | -4.42 % |
| 1996 | 13.63 | -1.81 % |
| 1997 | 18.10 | 32.83 % |
| 1998 | 19.44 | 7.40 % |
| 1999 | 17.46 | -10.19 % |
| 2000 | 20.37 | 16.71 % |
| 2001 | 20.46 | 0.44 % |
| 2002 | 18.89 | -7.69 % |
| 2003 | 17.77 | -5.92 % |
| 2004 | 17.04 | -4.12 % |
| 2005 | 18.63 | 9.33 % |
| 2006 | 19.46 | 4.44 % |
| 2007 | 22.32 | 14.71 % |
| 2008 | 20.46 | -8.32 % |
| 2009 | 16.46 | -19.55 % |
| 2010 | 17.12 | 4.01 % |
|
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