|
| year | production | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 47.99 | NA |
| 1993 | 44.69 | -6.88 % |
| 1994 | 42.30 | -5.33 % |
| 1995 | 41.42 | -2.09 % |
| 1996 | 39.95 | -3.55 % |
| 1997 | 38.74 | -3.02 % |
| 1998 | 39.07 | 0.84 % |
| 1999 | 40.81 | 4.46 % |
| 2000 | 41.70 | 2.17 % |
| 2001 | 42.63 | 2.23 % |
| 2002 | 44.16 | 3.60 % |
| 2003 | 47.18 | 6.84 % |
| 2004 | 49.86 | 5.69 % |
| 2005 | 51.08 | 2.44 % |
| 2006 | 52.06 | 1.91 % |
| 2007 | 52.56 | 0.97 % |
| 2008 | 52.55 | -0.03 % |
| 2009 | 50.43 | -4.03 % |
| 2010 | 53.22 | 5.54 % |
|
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