|
| year | production | change |
| 1980 | .41 | NA |
| 1981 | .41 | -0.45 % |
| 1982 | .40 | -2.49 % |
| 1983 | .41 | 3.53 % |
| 1984 | .43 | 3.19 % |
| 1985 | .44 | 3.12 % |
| 1986 | .48 | 8.28 % |
| 1987 | .57 | 19.59 % |
| 1988 | .64 | 13.33 % |
| 1989 | .83 | 28.68 % |
| 1990 | 1.00 | 20.78 % |
| 1991 | 1.26 | 25.30 % |
| 1992 | 1.24 | -1.56 % |
| 1993 | 1.41 | 14.03 % |
| 1994 | 1.43 | 1.17 % |
| 1995 | 1.44 | 0.84 % |
| 1996 | 1.51 | 5.07 % |
| 1997 | 1.48 | -2.15 % |
| 1998 | 1.50 | 1.60 % |
| 1999 | 1.48 | -1.52 % |
| 2000 | 1.46 | -1.17 % |
| 2001 | 1.37 | -6.59 % |
| 2002 | 1.42 | 4.01 % |
| 2003 | 1.40 | -1.27 % |
| 2004 | 1.38 | -1.60 % |
| 2005 | 1.29 | -6.76 % |
| 2006 | 1.23 | -4.38 % |
| 2007 | 1.16 | -5.93 % |
| 2008 | 1.13 | -2.70 % |
| 2009 | 1.13 | 0.58 % |
| 2010 | 1.23 | 8.39 % |
|
|