|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.66 | NA |
| 1987 | 4.28 | -8.18 % |
| 1988 | 3.57 | -16.57 % |
| 1989 | 3.90 | 9.17 % |
| 1990 | 4.07 | 4.35 % |
| 1991 | 3.90 | -4.09 % |
| 1992 | 3.95 | 1.27 % |
| 1993 | 3.94 | -0.26 % |
| 1994 | 4.02 | 2.15 % |
| 1995 | 2.39 | -40.53 % |
| 1996 | 2.05 | -14.39 % |
| 1997 | 3.58 | 74.70 % |
| 1998 | 3.58 | 0.00 % |
| 1999 | 3.68 | 2.96 % |
| 2000 | 3.63 | -1.42 % |
| 2001 | 1.29 | -64.44 % |
| 2002 | 1.36 | 4.92 % |
| 2003 | .83 | -39.06 % |
| 2004 | 1.22 | 48.31 % |
| 2005 | 1.14 | -6.64 % |
| 2006 | 1.14 | 0.00 % |
| 2007 | .40 | -64.82 % |
| 2008 | .42 | 5.26 % |
| 2009 | .06 | -85.00 % |
| 2010 | .08 | 33.34 % |
|
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