|
| year | production | change |
| 1980 | 53.52 | NA |
| 1981 | 115.94 | 116.63 % |
| 1982 | 90.75 | -21.73 % |
| 1983 | 115.85 | 27.66 % |
| 1984 | 132.30 | 14.20 % |
| 1985 | 163.94 | 23.91 % |
| 1986 | 191.25 | 16.66 % |
| 1987 | 139.94 | -26.83 % |
| 1988 | 155.21 | 10.91 % |
| 1989 | 132.58 | -14.58 % |
| 1990 | 107.15 | -19.18 % |
| 1991 | 62.60 | -41.57 % |
| 1992 | 94.78 | 51.40 % |
| 1993 | 91.60 | -3.36 % |
| 1994 | 69.47 | -24.15 % |
| 1995 | 56.68 | -18.42 % |
| 1996 | 22.82 | -59.74 % |
| 1997 | 24.30 | 6.51 % |
| 1998 | 23.18 | -4.60 % |
| 1999 | 23.80 | 2.66 % |
| 2000 | 18.33 | -22.97 % |
| 2001 | 20.79 | 13.41 % |
| 2002 | 24.35 | 17.13 % |
| 2003 | 17.27 | -29.06 % |
| 2004 | 17.97 | 4.02 % |
| 2005 | 46.96 | 161.35 % |
| 2006 | 113.17 | 141.01 % |
| 2007 | 118.01 | 4.28 % |
| 2008 | 146.77 | 24.37 % |
| 2009 | 160.30 | 9.22 % |
| 2010 | 101.37 | -36.76 % |
| 2011 | 108.52 | 7.06 % |
|
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