|
| year | production | change |
| 1984 | 51.44 | NA |
| 1985 | 47.48 | -7.70 % |
| 1986 | 46.65 | -1.73 % |
| 1987 | 50.28 | 7.77 % |
| 1988 | 46.29 | -7.93 % |
| 1989 | 41.52 | -10.31 % |
| 1990 | 54.21 | 30.58 % |
| 1991 | 42.64 | -21.36 % |
| 1992 | 40.98 | -3.89 % |
| 1993 | 40.95 | -0.05 % |
| 1994 | 41.50 | 1.32 % |
| 1995 | 34.04 | -17.96 % |
| 1996 | 28.42 | -16.52 % |
| 1997 | 28.04 | -1.33 % |
| 1998 | 27.05 | -3.55 % |
| 1999 | 36.94 | 36.56 % |
| 2000 | 33.17 | -10.19 % |
| 2001 | 28.24 | -14.87 % |
| 2002 | 31.56 | 11.77 % |
| 2003 | 36.92 | 16.96 % |
| 2004 | 31.17 | -15.56 % |
| 2005 | 31.28 | 0.35 % |
| 2006 | 17.45 | -44.23 % |
| 2007 | 15.33 | -12.12 % |
| 2008 | 15.33 | -0.02 % |
| 2009 | 12.07 | -21.26 % |
| 2010 | 12.26 | 1.61 % |
|
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