|
| year | production | change |
| 1980 | 8,838.33 | NA |
| 1981 | 13,971.80 | 58.08 % |
| 1982 | 14,099.67 | 0.92 % |
| 1983 | 12,462.73 | -11.61 % |
| 1984 | 13,134.04 | 5.39 % |
| 1985 | 13,005.07 | -0.98 % |
| 1986 | 11,294.28 | -13.15 % |
| 1987 | 8,501.03 | -24.73 % |
| 1988 | 4,590.02 | -46.01 % |
| 1989 | 4,716.79 | 2.76 % |
| 1990 | 2,692.95 | -42.91 % |
| 1991 | 2,322.57 | -13.75 % |
| 1992 | 1,319.47 | -43.19 % |
| 1993 | 1,070.34 | -18.88 % |
| 1994 | 830.04 | -22.45 % |
| 1995 | 702.17 | -15.41 % |
| 1996 | 617.29 | -12.09 % |
| 1997 | 470.69 | -23.75 % |
| 1998 | 343.92 | -26.93 % |
| 1999 | 401.24 | 16.67 % |
| 2000 | 413.37 | 3.02 % |
| 2001 | 240.30 | -41.87 % |
| 2002 | 190.70 | -20.64 % |
| 2003 | 142.20 | -25.43 % |
| 2004 | 199.52 | 40.31 % |
| 2005 | 120.15 | -39.78 % |
| 2006 | 30.86 | -74.31 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
| 2011 | | NA |
|
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