|
| year | production | change |
| 1980 | .45 | NA |
| 1981 | .11 | -75.88 % |
| 1982 | .25 | 133.03 % |
| 1983 | .42 | 64.17 % |
| 1984 | .24 | -43.65 % |
| 1985 | .15 | -38.30 % |
| 1986 | .07 | -49.66 % |
| 1987 | .07 | 0.00 % |
| 1988 | .05 | -26.03 % |
| 1989 | .05 | 0.00 % |
| 1990 | .05 | 0.00 % |
| 1991 | .04 | -33.33 % |
| 1992 | .02 | -50.00 % |
| 1993 | .01 | -44.44 % |
| 1994 | .08 | 709.90 % |
| 1995 | .08 | 0.01 % |
| 1996 | | NA |
| 1997 | | NA |
| 1998 | | NA |
| 1999 | | NA |
| 2000 | | NA |
| 2001 | | NA |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
| 2011 | | NA |
| 2012 | | NA |
|
|