|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.67 | NA |
| 1987 | 2.46 | -7.60 % |
| 1988 | 2.49 | 1.10 % |
| 1989 | 2.66 | 6.70 % |
| 1990 | 3.28 | 23.42 % |
| 1991 | 2.82 | -14.13 % |
| 1992 | 1.90 | -32.39 % |
| 1993 | 2.19 | 15.16 % |
| 1994 | 2.29 | 4.24 % |
| 1995 | 2.30 | 0.55 % |
| 1996 | 2.36 | 2.51 % |
| 1997 | 2.35 | -0.14 % |
| 1998 | 2.54 | 7.86 % |
| 1999 | 3.41 | 34.41 % |
| 2000 | 4.13 | 21.18 % |
| 2001 | 4.11 | -0.57 % |
| 2002 | 4.11 | -0.01 % |
| 2003 | 4.29 | 4.33 % |
| 2004 | 4.07 | -5.07 % |
| 2005 | 4.25 | 4.52 % |
| 2006 | 3.21 | -24.63 % |
| 2007 | 2.64 | -17.71 % |
| 2008 | 2.48 | -6.02 % |
| 2009 | 2.18 | -11.96 % |
| 2010 | .95 | -56.59 % |
|
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