|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .39 | NA |
| 1987 | .32 | -19.27 % |
| 1988 | .34 | 5.65 % |
| 1989 | .34 | 0.53 % |
| 1990 | .35 | 4.76 % |
| 1991 | .21 | -40.47 % |
| 1992 | .25 | 18.12 % |
| 1993 | .25 | 0.78 % |
| 1994 | .25 | 0.00 % |
| 1995 | .25 | 0.00 % |
| 1996 | .25 | 0.00 % |
| 1997 | .25 | 0.00 % |
| 1998 | .25 | 0.00 % |
| 1999 | .25 | 0.00 % |
| 2000 | | NA |
| 2001 | | NA |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | .51 | NA |
| 2007 | .46 | -10.46 % |
| 2008 | .46 | 0.00 % |
| 2009 | | NA |
| 2010 | | NA |
|
|