|
| year | production | change |
| 1980 | .64 | NA |
| 1981 | .72 | 12.97 % |
| 1982 | .74 | 2.65 % |
| 1983 | .86 | 16.17 % |
| 1984 | .94 | 9.71 % |
| 1985 | 1.13 | 19.88 % |
| 1986 | 1.28 | 13.13 % |
| 1987 | 1.34 | 4.75 % |
| 1988 | 1.41 | 5.34 % |
| 1989 | 1.49 | 5.74 % |
| 1990 | 1.59 | 6.35 % |
| 1991 | 1.64 | 3.46 % |
| 1992 | 1.72 | 4.83 % |
| 1993 | 1.82 | 5.50 % |
| 1994 | 1.90 | 4.71 % |
| 1995 | 1.99 | 4.85 % |
| 1996 | 2.07 | 3.62 % |
| 1997 | 2.13 | 3.10 % |
| 1998 | 2.20 | 3.10 % |
| 1999 | 2.17 | -1.40 % |
| 2000 | 2.43 | 12.05 % |
| 2001 | 2.48 | 2.14 % |
| 2002 | 2.48 | 0.20 % |
| 2003 | 2.35 | -5.42 % |
| 2004 | 2.26 | -3.87 % |
| 2005 | 2.38 | 5.61 % |
| 2006 | 2.45 | 2.63 % |
| 2007 | 2.40 | -2.04 % |
| 2008 | 2.50 | 4.36 % |
| 2009 | 2.64 | 5.55 % |
| 2010 | 2.84 | 7.39 % |
|
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