|
| year | production | change |
| 1980 | 1.45 | NA |
| 1981 | 1.48 | 1.98 % |
| 1982 | 1.69 | 14.16 % |
| 1983 | 1.84 | 8.89 % |
| 1984 | 2.08 | 12.95 % |
| 1985 | 2.23 | 7.36 % |
| 1986 | 2.09 | -6.28 % |
| 1987 | 2.30 | 9.86 % |
| 1988 | 2.24 | -2.66 % |
| 1989 | 2.32 | 3.65 % |
| 1990 | 2.36 | 1.79 % |
| 1991 | 2.40 | 1.45 % |
| 1992 | 2.39 | -0.30 % |
| 1993 | 2.48 | 3.87 % |
| 1994 | 2.52 | 1.65 % |
| 1995 | 2.60 | 3.07 % |
| 1996 | 2.65 | 1.94 % |
| 1997 | 2.51 | -5.15 % |
| 1998 | 2.48 | -1.45 % |
| 1999 | 2.59 | 4.73 % |
| 2000 | 2.55 | -1.82 % |
| 2001 | 2.69 | 5.67 % |
| 2002 | 2.67 | -0.88 % |
| 2003 | 2.85 | 6.92 % |
| 2004 | 2.86 | 0.20 % |
| 2005 | 3.13 | 9.50 % |
| 2006 | 3.19 | 1.94 % |
| 2007 | 3.25 | 1.86 % |
| 2008 | 3.76 | 15.77 % |
| 2009 | 3.92 | 4.28 % |
| 2010 | 3.85 | -1.74 % |
|
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