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Loading...
| year | production | change |
| 1986 | 3.30 | NA |
| 1987 | 3.70 | 12.12% |
| 1988 | 4.20 | 13.51% |
| 1989 | 4.00 | -4.76% |
| 1990 | 4.70 | 17.50% |
| 1991 | 5.70 | 21.28% |
| 1992 | 5.10 | -10.53% |
| 1993 | 5.20 | 1.96% |
| 1994 | 6.60 | 26.92% |
| 1995 | 6.10 | -7.58% |
| 1996 | 5.30 | -13.11% |
| 1997 | 7.50 | 41.51% |
| 1998 | 7.80 | 4.00% |
| 1999 | 8.40 | 7.69% |
| 2000 | 8.30 | -1.19% |
| 2001 | 8.00 | -3.61% |
| 2002 | 7.40 | -7.50% |
| 2003 | 6.70 | -9.46% |
| 2004 | 1.80 | -73.13% |
| 2005 | .00 | -100.00% |
| 2006 | .00 | NA |
| 2007 | .00 | NA |
| 2008 | .00 | NA |
| 2009 | .00 | NA |
| 2010 | .00 | NA |
| 2011 | .00 | NA |
| 2012 | .00 | NA |
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