|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.69 | NA |
| 1987 | 2.65 | -1.57 % |
| 1988 | 2.66 | 0.52 % |
| 1989 | 2.65 | -0.52 % |
| 1990 | 2.67 | 0.80 % |
| 1991 | .48 | -82.01 % |
| 1992 | 1.65 | 243.20 % |
| 1993 | 1.67 | 1.56 % |
| 1994 | 2.71 | 62.03 % |
| 1995 | 2.75 | 1.56 % |
| 1996 | 2.79 | 1.26 % |
| 1997 | 2.80 | 0.27 % |
| 1998 | 2.82 | 0.76 % |
| 1999 | 2.82 | 0.00 % |
| 2000 | 2.83 | 0.48 % |
| 2001 | 1.42 | -49.86 % |
| 2002 | 1.44 | 1.49 % |
| 2003 | 1.48 | 2.94 % |
| 2004 | 1.48 | -0.27 % |
| 2005 | 2.03 | 37.52 % |
| 2006 | 3.03 | 48.96 % |
| 2007 | 3.05 | 0.70 % |
| 2008 | 3.11 | 1.83 % |
| 2009 | 2.55 | -17.87 % |
| 2010 | 2.55 | 0.00 % |
|
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