|
| year | production | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.64 | NA |
| 1987 | 1.71 | 4.29 % |
| 1988 | 1.72 | 1.09 % |
| 1989 | 1.64 | -5.15 % |
| 1990 | 1.52 | -7.14 % |
| 1991 | 2.44 | 60.57 % |
| 1992 | 2.59 | 6.06 % |
| 1993 | 2.66 | 2.79 % |
| 1994 | 2.69 | 1.07 % |
| 1995 | 2.12 | -21.00 % |
| 1996 | 2.38 | 11.95 % |
| 1997 | 2.15 | -9.42 % |
| 1998 | 2.36 | 9.63 % |
| 1999 | 2.20 | -6.93 % |
| 2000 | 2.37 | 8.05 % |
| 2001 | 2.43 | 2.28 % |
| 2002 | 2.38 | -1.81 % |
| 2003 | 2.36 | -0.98 % |
| 2004 | 2.31 | -2.25 % |
| 2005 | 2.29 | -0.74 % |
| 2006 | 2.15 | -6.13 % |
| 2007 | 2.03 | -5.42 % |
| 2008 | 1.96 | -3.45 % |
| 2009 | 2.36 | 20.24 % |
| 2010 | 2.24 | -4.95 % |
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