|
| year | production | change |
| 1980 | 7.72 | NA |
| 1981 | 7.72 | 0.00 % |
| 1982 | 7.72 | 0.00 % |
| 1983 | 7.72 | 0.00 % |
| 1984 | 7.72 | 0.00 % |
| 1985 | 8.82 | 14.29 % |
| 1986 | 9.92 | 12.50 % |
| 1987 | 8.82 | -11.11 % |
| 1988 | 11.02 | 25.00 % |
| 1989 | 16.53 | 50.00 % |
| 1990 | 11.02 | -33.33 % |
| 1991 | 16.53 | 50.00 % |
| 1992 | 16.53 | 0.00 % |
| 1993 | 22.05 | 33.33 % |
| 1994 | 22.05 | 0.00 % |
| 1995 | 24.25 | 10.00 % |
| 1996 | 13.23 | -45.45 % |
| 1997 | 12.13 | -8.33 % |
| 1998 | 8.82 | -27.27 % |
| 1999 | 5.51 | -37.50 % |
| 2000 | | NA |
| 2001 | | NA |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
| 2011 | | NA |
|
|
