|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | 9.61 |
| 1987 | | 9.61 |
| 1988 | .00 | 9.58 |
| 1989 | .00 | 11.20 |
| 1990 | .35 | 12.70 |
| 1991 | .35 | 22.83 |
| 1992 | .35 | 25.82 |
| 1993 | .35 | 33.01 |
| 1994 | .35 | 35.60 |
| 1995 | .35 | 41.22 |
| 1996 | .35 | 57.34 |
| 1997 | .36 | 54.91 |
| 1998 | .30 | 62.68 |
| 1999 | | 76.89 |
| 2000 | | 82.10 |
| 2001 | .00 | 84.82 |
| 2002 | | 82.53 |
| 2003 | | 90.07 |
| 2004 | | 111.64 |
| 2005 | | 114.70 |
| 2006 | | 107.46 |
| 2007 | | 125.47 |
| 2008 | | 125.02 |
| 2009 | 11.31 | 128.69 |
| 2010 | 54.59 | 108.25 |
|
|