|
| year | production | change |
| 1984 | 9.28 | NA |
| 1985 | 12.70 | 36.83 % |
| 1986 | 10.29 | -18.95 % |
| 1987 | 11.59 | 12.65 % |
| 1988 | 7.94 | -31.48 % |
| 1989 | 9.12 | 14.76 % |
| 1990 | 14.27 | 56.54 % |
| 1991 | 6.43 | -54.92 % |
| 1992 | 3.47 | -46.10 % |
| 1993 | 3.17 | -8.50 % |
| 1994 | 6.07 | 91.19 % |
| 1995 | 7.04 | 16.08 % |
| 1996 | 3.89 | -44.74 % |
| 1997 | 4.08 | 4.92 % |
| 1998 | 2.79 | -31.74 % |
| 1999 | 2.61 | -6.19 % |
| 2000 | 2.43 | -6.96 % |
| 2001 | .50 | -79.49 % |
| 2002 | -3.33 | -767.03 % |
| 2003 | -2.46 | -25.95 % |
| 2004 | 4.27 | -273.16 % |
| 2005 | 1.38 | -67.56 % |
| 2006 | 4.68 | 238.61 % |
| 2007 | 2.63 | -43.80 % |
| 2008 | 4.86 | 84.72 % |
| 2009 | 3.71 | -23.67 % |
| 2010 | 5.35 | 44.21 % |
|
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