|
| year | production | change |
| 1980 | .87 | NA |
| 1981 | .99 | 13.20 % |
| 1982 | .95 | -3.51 % |
| 1983 | 1.07 | 12.29 % |
| 1984 | 1.21 | 12.98 % |
| 1985 | 1.31 | 8.23 % |
| 1986 | 1.32 | 0.64 % |
| 1987 | 1.40 | 6.51 % |
| 1988 | 1.39 | -0.96 % |
| 1989 | 1.39 | 0.10 % |
| 1990 | 1.42 | 1.75 % |
| 1991 | 1.41 | -0.40 % |
| 1992 | 1.39 | -1.21 % |
| 1993 | 1.37 | -1.35 % |
| 1994 | 1.33 | -3.26 % |
| 1995 | 1.39 | 4.65 % |
| 1996 | 1.27 | -9.06 % |
| 1997 | 1.40 | 10.58 % |
| 1998 | 1.50 | 6.94 % |
| 1999 | 1.46 | -2.42 % |
| 2000 | 1.39 | -4.68 % |
| 2001 | 1.55 | 11.10 % |
| 2002 | 1.37 | -11.25 % |
| 2003 | 1.24 | -9.26 % |
| 2004 | 1.43 | 14.65 % |
| 2005 | 1.51 | 5.60 % |
| 2006 | 1.35 | -10.39 % |
| 2007 | 1.41 | 4.30 % |
| 2008 | 1.42 | 0.55 % |
| 2009 | 1.28 | -9.65 % |
| 2010 | 1.36 | 6.30 % |
|
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