|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 6.08 | NA |
| 1987 | 4.56 | -25.00 % |
| 1988 | 3.07 | -32.68 % |
| 1989 | 3.06 | -0.37 % |
| 1990 | 3.41 | 11.41 % |
| 1991 | 3.10 | -9.09 % |
| 1992 | 3.38 | 9.15 % |
| 1993 | 4.04 | 19.65 % |
| 1994 | 4.47 | 10.57 % |
| 1995 | 4.91 | 9.79 % |
| 1996 | 4.03 | -17.84 % |
| 1997 | 5.96 | 47.80 % |
| 1998 | 6.29 | 5.49 % |
| 1999 | 6.24 | -0.74 % |
| 2000 | 6.11 | -2.14 % |
| 2001 | 5.38 | -11.97 % |
| 2002 | 6.40 | 19.13 % |
| 2003 | 8.37 | 30.66 % |
| 2004 | 8.65 | 3.35 % |
| 2005 | 8.58 | -0.81 % |
| 2006 | 8.34 | -2.72 % |
| 2007 | 8.58 | 2.80 % |
| 2008 | 7.99 | -6.81 % |
| 2009 | 8.39 | 4.97 % |
| 2010 | 9.89 | 17.83 % |
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