|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.99 | NA |
| 1987 | 5.25 | 5.20 % |
| 1988 | 5.59 | 6.43 % |
| 1989 | 5.87 | 4.96 % |
| 1990 | 6.05 | 3.15 % |
| 1991 | 3.97 | -34.34 % |
| 1992 | 6.75 | 69.83 % |
| 1993 | 6.75 | 0.10 % |
| 1994 | 7.48 | 10.73 % |
| 1995 | 7.06 | -5.63 % |
| 1996 | 7.60 | 7.65 % |
| 1997 | 7.92 | 4.27 % |
| 1998 | 8.10 | 2.27 % |
| 1999 | 6.85 | -15.49 % |
| 2000 | 8.95 | 30.70 % |
| 2001 | 9.35 | 4.45 % |
| 2002 | 5.54 | -40.75 % |
| 2003 | 6.10 | 10.13 % |
| 2004 | 5.22 | -14.41 % |
| 2005 | 5.56 | 6.54 % |
| 2006 | 4.16 | -25.21 % |
| 2007 | 3.34 | -19.66 % |
| 2008 | 3.01 | -9.79 % |
| 2009 | 2.90 | -3.88 % |
| 2010 | .44 | -84.68 % |
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