|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.50 | NA |
| 1987 | 4.52 | 0.51 % |
| 1988 | 2.24 | -50.53 % |
| 1989 | 2.73 | 22.05 % |
| 1990 | 3.30 | 20.92 % |
| 1991 | 3.94 | 19.35 % |
| 1992 | 4.03 | 2.33 % |
| 1993 | 2.22 | -44.94 % |
| 1994 | 2.71 | 22.11 % |
| 1995 | 3.16 | 16.73 % |
| 1996 | 3.85 | 21.57 % |
| 1997 | 4.18 | 8.60 % |
| 1998 | 4.56 | 9.07 % |
| 1999 | 2.17 | -52.31 % |
| 2000 | 3.13 | 43.95 % |
| 2001 | 3.01 | -3.85 % |
| 2002 | 3.51 | 16.53 % |
| 2003 | 2.59 | -26.00 % |
| 2004 | 1.84 | -28.93 % |
| 2005 | 1.68 | -8.74 % |
| 2006 | 2.90 | 72.22 % |
| 2007 | 2.43 | -16.13 % |
| 2008 | 3.01 | 24.04 % |
| 2009 | 3.01 | 0.00 % |
| 2010 | 2.87 | -4.65 % |
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