|
| year | production | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | 23.00 | NA |
| 1984 | 27.00 | 17.39 % |
| 1985 | 28.00 | 3.70 % |
| 1986 | 20.00 | -28.57 % |
| 1987 | 18.00 | -10.00 % |
| 1988 | 12.00 | -33.33 % |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 1.50 | NA |
| 1993 | .50 | -66.67 % |
| 1994 | 6.82 | 1,264.00 % |
| 1995 | | NA |
| 1996 | 16.00 | NA |
| 1997 | 18.77 | 17.29 % |
| 1998 | 20.00 | 6.57 % |
| 1999 | 15.00 | -25.00 % |
| 2000 | 11.50 | -23.35 % |
| 2001 | 11.00 | -4.33 % |
| 2002 | 12.00 | 9.09 % |
| 2003 | 19.00 | 58.33 % |
| 2004 | 26.00 | 36.84 % |
| 2005 | 39.00 | 50.00 % |
| 2006 | 62.00 | 58.97 % |
| 2007 | 52.00 | -16.13 % |
| 2008 | 59.17 | 13.78 % |
| 2009 | 57.82 | -2.28 % |
| 2010 | 43.83 | -24.19 % |
| 2011 | 39.59 | -9.68 % |
| 2012 | 37.92 | -4.23 % |
|
|