|
| year | production | change |
| 1980 | 429.90 | NA |
| 1981 | 548.95 | 27.69 % |
| 1982 | 567.69 | 3.41 % |
| 1983 | 535.72 | -5.63 % |
| 1984 | 559.97 | 4.53 % |
| 1985 | 440.92 | -21.26 % |
| 1986 | 401.24 | -9.00 % |
| 1987 | 411.16 | 2.47 % |
| 1988 | 564.38 | 37.27 % |
| 1989 | 567.69 | 0.59 % |
| 1990 | 305.34 | -46.21 % |
| 1991 | 321.87 | 5.42 % |
| 1992 | 222.67 | -30.82 % |
| 1993 | 184.09 | -17.33 % |
| 1994 | 383.60 | 108.38 % |
| 1995 | 336.21 | -12.36 % |
| 1996 | 342.82 | 1.97 % |
| 1997 | 275.58 | -19.61 % |
| 1998 | 318.57 | 15.60 % |
| 1999 | 369.94 | 16.12 % |
| 2000 | 285.85 | -22.73 % |
| 2001 | 205.51 | -28.10 % |
| 2002 | 106.49 | -48.18 % |
| 2003 | 98.11 | -7.88 % |
| 2004 | 56.22 | -42.70 % |
| 2005 | 27.56 | -50.98 % |
| 2006 | 155.43 | 464.00 % |
| 2007 | 121.25 | -21.99 % |
| 2008 | 102.16 | -15.75 % |
| 2009 | 90.39 | -11.52 % |
| 2010 | 71.65 | -20.73 % |
| 2011 | 89.29 | 24.62 % |
|
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