|
| year | production | change |
| 1980 | | NA |
| 1981 | 5.42 | NA |
| 1982 | 14.71 | 171.43 % |
| 1983 | 27.10 | 84.21 % |
| 1984 | 33.20 | 22.52 % |
| 1985 | 40.26 | 21.26 % |
| 1986 | 46.45 | 15.38 % |
| 1987 | 53.42 | 15.00 % |
| 1988 | 54.04 | 1.17 % |
| 1989 | 54.96 | 1.71 % |
| 1990 | 48.77 | -11.27 % |
| 1991 | 56.51 | 15.87 % |
| 1992 | 64.08 | 13.39 % |
| 1993 | 75.30 | 17.51 % |
| 1994 | 84.08 | 11.66 % |
| 1995 | 88.56 | 5.33 % |
| 1996 | 63.33 | -28.49 % |
| 1997 | 84.04 | 32.70 % |
| 1998 | 91.65 | 9.06 % |
| 1999 | 95.56 | 4.27 % |
| 2000 | 105.54 | 10.44 % |
| 2001 | 115.15 | 9.11 % |
| 2002 | 139.61 | 21.24 % |
| 2003 | 182.94 | 31.04 % |
| 2004 | 221.47 | 21.06 % |
| 2005 | 254.69 | 15.00 % |
| 2006 | 318.61 | 25.10 % |
| 2007 | 425.38 | 33.51 % |
| 2008 | 605.57 | 42.36 % |
| 2009 | 713.49 | 17.82 % |
| 2010 | 867.44 | 21.58 % |
| 2011 | 908.62 | 4.75 % |
|
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