|
| year | production | change |
| 1980 | 1.20 | NA |
| 1981 | 1.05 | -12.32 % |
| 1982 | .93 | -11.38 % |
| 1983 | .84 | -10.00 % |
| 1984 | 1.09 | 30.02 % |
| 1985 | .88 | -19.67 % |
| 1986 | .88 | 0.66 % |
| 1987 | .86 | -2.67 % |
| 1988 | .99 | 15.31 % |
| 1989 | 1.06 | 7.05 % |
| 1990 | 1.20 | 13.28 % |
| 1991 | 1.25 | 3.76 % |
| 1992 | 1.39 | 11.66 % |
| 1993 | 1.45 | 3.98 % |
| 1994 | 1.44 | -0.19 % |
| 1995 | 1.51 | 4.42 % |
| 1996 | 1.66 | 9.82 % |
| 1997 | 1.90 | 14.78 % |
| 1998 | 2.31 | 21.49 % |
| 1999 | 2.37 | 2.71 % |
| 2000 | 2.82 | 18.91 % |
| 2001 | 2.71 | -3.81 % |
| 2002 | 2.74 | 1.19 % |
| 2003 | 2.95 | 7.39 % |
| 2004 | 3.45 | 17.06 % |
| 2005 | 3.92 | 13.76 % |
| 2006 | 4.17 | 6.24 % |
| 2007 | 4.62 | 10.79 % |
| 2008 | 5.33 | 15.36 % |
| 2009 | 5.82 | 9.24 % |
| 2010 | 6.55 | 12.57 % |
|
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