|
| year | production | change |
| 1984 | 49.91 | NA |
| 1985 | 52.67 | 5.52 % |
| 1986 | 36.76 | -30.19 % |
| 1987 | 40.45 | 10.04 % |
| 1988 | 38.98 | -3.64 % |
| 1989 | 43.66 | 12.00 % |
| 1990 | 44.92 | 2.89 % |
| 1991 | 50.87 | 13.25 % |
| 1992 | 47.20 | -7.23 % |
| 1993 | 43.62 | -7.57 % |
| 1994 | 41.57 | -4.71 % |
| 1995 | 46.27 | 11.30 % |
| 1996 | 31.61 | -31.69 % |
| 1997 | 33.10 | 4.73 % |
| 1998 | 31.13 | -5.96 % |
| 1999 | 30.92 | -0.69 % |
| 2000 | 36.76 | 18.90 % |
| 2001 | 33.80 | -8.05 % |
| 2002 | 27.88 | -17.50 % |
| 2003 | 25.02 | -10.28 % |
| 2004 | 17.54 | -29.88 % |
| 2005 | 20.78 | 18.47 % |
| 2006 | 18.70 | -10.01 % |
| 2007 | 17.52 | -6.33 % |
| 2008 | 17.31 | -1.21 % |
| 2009 | 15.80 | -8.69 % |
| 2010 | 16.59 | 4.96 % |
|
|
