|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 48.96 | NA |
| 1987 | 49.60 | 1.30 % |
| 1988 | 52.42 | 5.69 % |
| 1989 | 50.51 | -3.64 % |
| 1990 | 50.79 | 0.55 % |
| 1991 | 56.46 | 11.18 % |
| 1992 | 48.70 | -13.74 % |
| 1993 | 40.87 | -16.08 % |
| 1994 | 29.76 | -27.20 % |
| 1995 | 24.69 | -17.02 % |
| 1996 | 28.05 | 13.60 % |
| 1997 | 25.35 | -9.62 % |
| 1998 | 23.59 | -6.93 % |
| 1999 | 22.07 | -6.46 % |
| 2000 | 21.12 | -4.29 % |
| 2001 | 21.11 | -0.03 % |
| 2002 | 20.71 | -1.91 % |
| 2003 | 19.44 | -6.13 % |
| 2004 | 10.71 | -44.92 % |
| 2005 | 6.52 | -39.08 % |
| 2006 | 3.54 | -45.78 % |
| 2007 | 3.03 | -14.37 % |
| 2008 | 2.82 | -6.99 % |
| 2009 | 3.20 | 13.53 % |
| 2010 | 3.20 | 0.00 % |
|
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