|
| year | production | change |
| 1984 | 1.08 | NA |
| 1985 | 1.34 | 23.51 % |
| 1986 | 1.08 | -19.63 % |
| 1987 | 1.25 | 16.54 % |
| 1988 | .95 | -24.01 % |
| 1989 | 1.06 | 11.19 % |
| 1990 | 1.27 | 20.16 % |
| 1991 | 1.83 | 43.87 % |
| 1992 | 1.77 | -3.40 % |
| 1993 | 1.32 | -25.57 % |
| 1994 | 1.08 | -18.09 % |
| 1995 | .97 | -9.90 % |
| 1996 | 2.07 | 112.66 % |
| 1997 | 1.68 | -18.80 % |
| 1998 | 1.40 | -16.48 % |
| 1999 | 1.86 | 32.42 % |
| 2000 | 1.88 | 1.05 % |
| 2001 | 2.42 | 28.88 % |
| 2002 | 1.36 | -43.60 % |
| 2003 | 1.62 | 18.88 % |
| 2004 | 1.66 | 2.42 % |
| 2005 | 1.64 | -1.21 % |
| 2006 | 2.62 | 59.43 % |
| 2007 | 1.82 | -30.58 % |
| 2008 | 1.83 | 0.78 % |
| 2009 | 1.23 | -32.65 % |
| 2010 | 2.09 | 69.78 % |
|
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