|
| year | production | change |
| 1980 | .88 | NA |
| 1981 | .90 | 2.27 % |
| 1982 | .96 | 6.67 % |
| 1983 | 1.00 | 4.17 % |
| 1984 | 1.03 | 3.00 % |
| 1985 | 1.04 | 0.97 % |
| 1986 | 1.09 | 4.81 % |
| 1987 | 1.11 | 1.83 % |
| 1988 | 1.21 | 9.01 % |
| 1989 | 1.18 | -2.48 % |
| 1990 | 1.10 | -6.78 % |
| 1991 | .96 | -12.73 % |
| 1992 | 1.02 | 6.25 % |
| 1993 | .68 | -33.33 % |
| 1994 | .68 | 0.00 % |
| 1995 | .52 | -23.53 % |
| 1996 | .70 | 34.62 % |
| 1997 | .72 | 2.86 % |
| 1998 | .73 | 1.39 % |
| 1999 | .68 | -6.85 % |
| 2000 | .70 | 2.94 % |
| 2001 | .73 | 4.29 % |
| 2002 | .75 | 2.74 % |
| 2003 | .76 | 1.33 % |
| 2004 | .61 | -19.74 % |
| 2005 | .56 | -8.20 % |
| 2006 | .43 | -23.21 % |
|
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