|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 8.78 | NA |
| 1987 | 7.58 | -13.65 % |
| 1988 | 8.21 | 8.30 % |
| 1989 | 5.84 | -28.88 % |
| 1990 | 5.51 | -5.68 % |
| 1991 | 5.85 | 6.11 % |
| 1992 | 5.81 | -0.65 % |
| 1993 | 3.94 | -32.18 % |
| 1994 | 2.75 | -30.11 % |
| 1995 | 2.50 | -9.15 % |
| 1996 | 2.32 | -7.12 % |
| 1997 | 7.24 | 211.76 % |
| 1998 | 2.52 | -65.20 % |
| 1999 | 1.29 | -48.91 % |
| 2000 | .68 | -47.51 % |
| 2001 | .68 | 0.27 % |
| 2002 | .59 | -12.50 % |
| 2003 | .32 | -46.43 % |
| 2004 | .49 | 52.92 % |
| 2005 | .49 | 0.27 % |
| 2006 | .44 | -8.70 % |
| 2007 | .40 | -9.52 % |
| 2008 | .42 | 5.26 % |
| 2009 | .59 | 40.00 % |
| 2010 | .70 | 17.86 % |
|
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