|
| year | production | change |
| 1980 | .66 | NA |
| 1981 | .63 | -4.66 % |
| 1982 | .71 | 12.36 % |
| 1983 | .93 | 31.51 % |
| 1984 | 1.31 | 40.49 % |
| 1985 | 1.43 | 9.04 % |
| 1986 | 1.66 | 16.10 % |
| 1987 | 1.68 | 1.39 % |
| 1988 | 1.81 | 7.81 % |
| 1989 | 1.92 | 6.26 % |
| 1990 | 2.03 | 5.69 % |
| 1991 | 2.19 | 7.84 % |
| 1992 | 2.26 | 3.25 % |
| 1993 | 2.34 | 3.31 % |
| 1994 | 2.41 | 3.09 % |
| 1995 | 2.59 | 7.53 % |
| 1996 | 2.84 | 9.43 % |
| 1997 | 3.01 | 6.10 % |
| 1998 | 3.14 | 4.44 % |
| 1999 | 3.16 | 0.50 % |
| 2000 | 3.31 | 4.93 % |
| 2001 | 3.34 | 0.81 % |
| 2002 | 3.43 | 2.74 % |
| 2003 | 3.66 | 6.62 % |
| 2004 | 3.77 | 3.11 % |
| 2005 | 3.60 | -4.49 % |
| 2006 | 3.58 | -0.67 % |
| 2007 | 3.67 | 2.46 % |
| 2008 | 3.78 | 3.09 % |
| 2009 | 3.72 | -1.74 % |
| 2010 | 3.70 | -0.44 % |
|
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