|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 23.49 | NA |
| 1987 | 24.00 | 2.19 % |
| 1988 | 26.33 | 9.71 % |
| 1989 | 23.44 | -10.98 % |
| 1990 | 32.96 | 40.61 % |
| 1991 | 34.48 | 4.61 % |
| 1992 | 32.52 | -5.69 % |
| 1993 | 40.24 | 23.74 % |
| 1994 | 33.86 | -15.84 % |
| 1995 | 39.16 | 15.63 % |
| 1996 | 47.52 | 21.35 % |
| 1997 | 28.10 | -40.86 % |
| 1998 | 16.58 | -40.99 % |
| 1999 | 19.14 | 15.45 % |
| 2000 | 14.15 | -26.09 % |
| 2001 | 25.63 | 81.09 % |
| 2002 | 24.93 | -2.73 % |
| 2003 | 10.17 | -59.22 % |
| 2004 | 9.31 | -8.38 % |
| 2005 | 23.02 | 147.16 % |
| 2006 | 11.88 | -48.39 % |
| 2007 | 8.43 | -29.06 % |
| 2008 | 12.73 | 51.01 % |
| 2009 | 6.06 | -52.41 % |
| 2010 | 12.37 | 104.20 % |
|
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