|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 7.24 | NA |
| 1987 | 7.66 | 5.82 % |
| 1988 | 6.24 | -18.50 % |
| 1989 | 6.61 | 5.92 % |
| 1990 | 6.85 | 3.64 % |
| 1991 | 8.46 | 23.53 % |
| 1992 | 8.55 | 1.10 % |
| 1993 | 9.81 | 14.62 % |
| 1994 | 13.02 | 32.75 % |
| 1995 | 12.91 | -0.82 % |
| 1996 | 12.88 | -0.24 % |
| 1997 | 15.02 | 16.65 % |
| 1998 | 13.05 | -13.11 % |
| 1999 | 84.80 | 549.62 % |
| 2000 | 14.63 | -82.75 % |
| 2001 | 25.21 | 72.36 % |
| 2002 | 266.13 | 955.46 % |
| 2003 | 17.92 | -93.27 % |
| 2004 | 18.00 | 0.48 % |
| 2005 | 16.63 | -7.60 % |
| 2006 | 38.42 | 130.98 % |
| 2007 | 5.59 | -85.44 % |
| 2008 | 9.79 | 75.00 % |
| 2009 | 16.53 | 68.89 % |
| 2010 | 18.90 | 14.33 % |
|
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