|
| year | production | change |
| 1980 | .13 | NA |
| 1981 | .11 | -15.38 % |
| 1982 | .00 | -100.00 % |
| 1983 | .00 | NA |
| 1984 | .02 | NA |
| 1985 | .00 | -80.00 % |
| 1986 | .04 | 900.00 % |
| 1987 | .05 | 25.00 % |
| 1988 | .06 | 20.00 % |
| 1989 | .06 | 0.00 % |
| 1990 | .08 | 33.33 % |
| 1991 | .11 | 37.50 % |
| 1992 | .11 | 0.00 % |
| 1993 | .13 | 18.18 % |
| 1994 | .12 | -7.69 % |
| 1995 | .29 | 141.67 % |
| 1996 | .25 | -13.79 % |
| 1997 | .36 | 44.00 % |
| 1998 | .33 | -8.33 % |
| 1999 | .29 | -12.12 % |
| 2000 | .31 | 6.90 % |
| 2001 | .32 | 3.23 % |
| 2002 | .31 | -3.12 % |
| 2003 | .25 | -19.35 % |
| 2004 | .24 | -4.00 % |
| 2005 | .26 | 8.33 % |
| 2006 | .36 | 38.46 % |
|
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