|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.51 | NA |
| 1987 | 2.66 | 6.13 % |
| 1988 | 3.14 | 17.86 % |
| 1989 | 3.39 | 7.96 % |
| 1990 | 3.65 | 7.71 % |
| 1991 | 2.78 | -23.81 % |
| 1992 | 3.38 | 21.52 % |
| 1993 | 2.80 | -17.01 % |
| 1994 | 2.69 | -4.17 % |
| 1995 | 2.73 | 1.74 % |
| 1996 | 2.80 | 2.28 % |
| 1997 | 2.80 | 0.27 % |
| 1998 | 2.80 | 0.00 % |
| 1999 | 1.10 | -60.83 % |
| 2000 | .14 | -87.27 % |
| 2001 | 2.17 | 1,454.21 % |
| 2002 | 2.34 | 7.53 % |
| 2003 | 2.57 | 10.00 % |
| 2004 | 2.75 | 6.98 % |
| 2005 | 2.94 | 7.07 % |
| 2006 | 2.94 | 0.00 % |
| 2007 | 3.32 | 12.70 % |
| 2008 | 2.43 | -26.76 % |
| 2009 | 2.59 | 6.73 % |
| 2010 | 3.20 | 23.42 % |
|
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