|
| year | production | change |
| 1980 | 25.00 | NA |
| 1981 | 27.00 | 8.00 % |
| 1982 | 38.00 | 40.74 % |
| 1983 | 53.00 | 39.47 % |
| 1984 | 61.00 | 15.09 % |
| 1985 | 76.00 | 24.59 % |
| 1986 | 93.00 | 22.37 % |
| 1987 | 87.00 | -6.45 % |
| 1988 | 77.00 | -11.49 % |
| 1989 | 64.00 | -16.88 % |
| 1990 | 70.00 | 9.38 % |
| 1991 | 74.00 | 5.71 % |
| 1992 | 53.24 | -28.06 % |
| 1993 | 50.26 | -5.59 % |
| 1994 | 20.00 | -60.21 % |
| 1995 | 20.00 | 0.00 % |
| 1996 | 20.00 | 0.00 % |
| 1997 | 20.00 | 0.00 % |
| 1998 | 20.00 | 0.00 % |
| 1999 | 11.88 | -40.60 % |
| 2000 | 12.78 | 7.58 % |
| 2001 | 7.88 | -38.37 % |
| 2002 | 5.57 | -29.29 % |
| 2003 | 7.17 | 28.77 % |
| 2004 | 4.58 | -36.08 % |
| 2005 | 4.76 | 3.80 % |
| 2006 | 2.75 | -42.26 % |
| 2007 | 4.66 | 69.69 % |
| 2008 | 6.51 | 39.63 % |
| 2009 | 7.33 | 12.56 % |
| 2010 | 7.76 | 5.94 % |
| 2011 | 12.75 | 64.26 % |
| 2012 | 22.51 | 76.53 % |
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