|
| year | production | change |
| 1980 | .43 | NA |
| 1981 | .46 | 7.98 % |
| 1982 | .51 | 11.26 % |
| 1983 | .52 | 1.41 % |
| 1984 | .54 | 4.68 % |
| 1985 | .59 | 8.69 % |
| 1986 | .65 | 9.44 % |
| 1987 | .69 | 6.49 % |
| 1988 | .74 | 7.54 % |
| 1989 | .78 | 4.78 % |
| 1990 | .82 | 5.29 % |
| 1991 | .89 | 8.50 % |
| 1992 | .94 | 5.47 % |
| 1993 | .94 | 0.80 % |
| 1994 | 1.01 | 7.50 % |
| 1995 | 1.04 | 2.28 % |
| 1996 | 1.06 | 1.77 % |
| 1997 | 1.07 | 1.25 % |
| 1998 | 1.06 | -0.89 % |
| 1999 | 1.10 | 3.36 % |
| 2000 | 1.15 | 4.57 % |
| 2001 | 1.12 | -1.93 % |
| 2002 | 1.14 | 1.69 % |
| 2003 | 1.25 | 9.63 % |
| 2004 | 1.32 | 5.30 % |
| 2005 | 1.49 | 12.76 % |
| 2006 | 1.65 | 10.78 % |
| 2007 | 1.64 | -0.35 % |
| 2008 | 1.64 | 0.15 % |
| 2009 | 1.66 | 0.90 % |
| 2010 | 1.73 | 4.50 % |
|
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