|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | .79 | 2.79 |
| 1993 | .68 | .68 |
| 1994 | .42 | .42 |
| 1995 | .48 | .48 |
| 1996 | .82 | .82 |
| 1997 | 1.57 | 1.57 |
| 1998 | 1.51 | 1.51 |
| 1999 | 1.19 | 1.19 |
| 2000 | .70 | .32 |
| 2001 | 2.33 | 1.91 |
| 2002 | 2.39 | 1.98 |
| 2003 | 2.61 | 2.51 |
| 2004 | 3.11 | 5.08 |
| 2005 | 3.22 | 5.25 |
| 2006 | | |
| 2007 | | |
| 2008 | | |
| 2009 | | |
| 2010 | | |
|
|
