|
| year | production | change |
| 1980 | .46 | NA |
| 1981 | .47 | 2.54 % |
| 1982 | .48 | 0.25 % |
| 1983 | .54 | 14.04 % |
| 1984 | .61 | 11.74 % |
| 1985 | .66 | 9.06 % |
| 1986 | .69 | 4.57 % |
| 1987 | .43 | -37.48 % |
| 1988 | .72 | 65.88 % |
| 1989 | .67 | -7.01 % |
| 1990 | .68 | 2.28 % |
| 1991 | .71 | 4.49 % |
| 1992 | .76 | 7.07 % |
| 1993 | .82 | 7.53 % |
| 1994 | .87 | 6.43 % |
| 1995 | .92 | 5.22 % |
| 1996 | .94 | 2.66 % |
| 1997 | .92 | -2.14 % |
| 1998 | .90 | -2.89 % |
| 1999 | .90 | 0.08 % |
| 2000 | .95 | 6.25 % |
| 2001 | .98 | 3.25 % |
| 2002 | .94 | -4.34 % |
| 2003 | .98 | 4.18 % |
| 2004 | 1.24 | 26.55 % |
| 2005 | 1.25 | 0.34 % |
| 2006 | 1.26 | 1.37 % |
| 2007 | 1.23 | -2.63 % |
| 2008 | 1.24 | 0.46 % |
| 2009 | 1.17 | -5.29 % |
| 2010 | 1.17 | -0.25 % |
|
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