|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.70 | NA |
| 1987 | 4.91 | 4.42 % |
| 1988 | 5.01 | 2.10 % |
| 1989 | 4.91 | -2.06 % |
| 1990 | 4.50 | -8.31 % |
| 1991 | 1.87 | -58.45 % |
| 1992 | 1.98 | 5.96 % |
| 1993 | 1.40 | -29.22 % |
| 1994 | .91 | -34.96 % |
| 1995 | 1.00 | 10.19 % |
| 1996 | 1.72 | 71.62 % |
| 1997 | 1.73 | 0.27 % |
| 1998 | 1.73 | 0.00 % |
| 1999 | .58 | -66.22 % |
| 2000 | .56 | -4.26 % |
| 2001 | .82 | 46.23 % |
| 2002 | .49 | -40.00 % |
| 2003 | .14 | -71.43 % |
| 2004 | .82 | 481.74 % |
| 2005 | .33 | -59.89 % |
| 2006 | .82 | 150.00 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
|
|