|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 1.08 | 1.60 |
| 1993 | .57 | .57 |
| 1994 | .59 | .59 |
| 1995 | .44 | .44 |
| 1996 | .78 | .63 |
| 1997 | 1.14 | 1.14 |
| 1998 | 1.10 | 1.10 |
| 1999 | .70 | .70 |
| 2000 | .57 | .57 |
| 2001 | .70 | .70 |
| 2002 | .72 | .72 |
| 2003 | 1.74 | 2.73 |
| 2004 | .21 | .46 |
| 2005 | .21 | .49 |
| 2006 | | |
| 2007 | | |
| 2008 | | |
| 2009 | | |
| 2010 | | |
|
|