|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | .42 | .74 |
| 1987 | .77 | .60 |
| 1988 | .42 | |
| 1989 | .43 | .60 |
| 1990 | .44 | .62 |
| 1991 | .43 | .51 |
| 1992 | .63 | .63 |
| 1993 | .68 | .68 |
| 1994 | .80 | |
| 1995 | .78 | .74 |
| 1996 | .80 | .74 |
| 1997 | 2.35 | 2.35 |
| 1998 | 2.35 | 2.35 |
| 1999 | 2.35 | 2.35 |
| 2000 | 2.34 | 2.34 |
| 2001 | 2.35 | 2.35 |
| 2002 | .93 | .93 |
| 2003 | .97 | .97 |
| 2004 | .97 | .97 |
| 2005 | .97 | .97 |
| 2006 | 1.00 | 1.00 |
| 2007 | | |
| 2008 | | |
| 2009 | | |
| 2010 | | |
|
|