|
| year | production | change |
| 1980 | 43.00 | NA |
| 1981 | 53.04 | 23.35 % |
| 1982 | 47.00 | -11.39 % |
| 1983 | 47.00 | 0.00 % |
| 1984 | 52.00 | 10.64 % |
| 1985 | 50.00 | -3.85 % |
| 1986 | 40.00 | -20.00 % |
| 1987 | 43.20 | 8.00 % |
| 1988 | 24.01 | -44.42 % |
| 1989 | 50.15 | 108.87 % |
| 1990 | 80.00 | 59.52 % |
| 1991 | 34.35 | -57.06 % |
| 1992 | 31.08 | -9.53 % |
| 1993 | 29.31 | -5.69 % |
| 1994 | 32.49 | 10.85 % |
| 1995 | 33.55 | 3.26 % |
| 1996 | 32.14 | -4.21 % |
| 1997 | 32.84 | 2.20 % |
| 1998 | 31.43 | -4.30 % |
| 1999 | 31.43 | 0.00 % |
| 2000 | 31.43 | 0.00 % |
| 2001 | 30.02 | -4.49 % |
| 2002 | 32.84 | 9.41 % |
| 2003 | 29.31 | -10.75 % |
| 2004 | 30.02 | 2.41 % |
| 2005 | 28.25 | -5.88 % |
| 2006 | 15.19 | -46.25 % |
| 2007 | 13.42 | -11.63 % |
| 2008 | 10.95 | -18.42 % |
| 2009 | 10.95 | 0.00 % |
| 2010 | 9.18 | -16.13 % |
| 2011 | 10.24 | 11.54 % |
|
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