|
| year | production | change |
| 1980 | .05 | NA |
| 1981 | .06 | 15.11 % |
| 1982 | .07 | 10.48 % |
| 1983 | .07 | 5.71 % |
| 1984 | .10 | 38.41 % |
| 1985 | .10 | 3.57 % |
| 1986 | .11 | 8.98 % |
| 1987 | .13 | 15.93 % |
| 1988 | .15 | 14.84 % |
| 1989 | .17 | 10.47 % |
| 1990 | .16 | -1.14 % |
| 1991 | .17 | 5.98 % |
| 1992 | .20 | 17.97 % |
| 1993 | .22 | 8.60 % |
| 1994 | .24 | 9.98 % |
| 1995 | .26 | 7.98 % |
| 1996 | .27 | 3.25 % |
| 1997 | .27 | 0.93 % |
| 1998 | .30 | 7.63 % |
| 1999 | .32 | 9.77 % |
| 2000 | .35 | 7.99 % |
| 2001 | .37 | 6.62 % |
| 2002 | .41 | 9.08 % |
| 2003 | .46 | 12.02 % |
| 2004 | .50 | 8.45 % |
| 2005 | .53 | 7.97 % |
| 2006 | .59 | 10.57 % |
| 2007 | .62 | 5.52 % |
| 2008 | .69 | 11.08 % |
| 2009 | .75 | 8.93 % |
| 2010 | .76 | 1.12 % |
|
|