|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | .88 | .80 |
| 1987 | .88 | .85 |
| 1988 | .93 | .80 |
| 1989 | .94 | .90 |
| 1990 | .97 | .89 |
| 1991 | .90 | .86 |
| 1992 | .98 | .95 |
| 1993 | .94 | .87 |
| 1994 | 1.01 | .98 |
| 1995 | 1.07 | 1.04 |
| 1996 | .90 | 1.04 |
| 1997 | .81 | 1.16 |
| 1998 | .97 | 1.04 |
| 1999 | .97 | .84 |
| 2000 | 1.13 | 1.01 |
| 2001 | .94 | .81 |
| 2002 | .81 | .68 |
| 2003 | 1.41 | 1.35 |
| 2004 | .90 | 1.38 |
| 2005 | .87 | 1.57 |
| 2006 | 1.00 | 1.79 |
| 2007 | 1.05 | 2.45 |
| 2008 | 1.05 | 1.88 |
| 2009 | .97 | 1.82 |
| 2010 | .97 | 1.95 |
|
|
