|
Loading...
| year | production | consumption |
| 1986 | .60 | 3.00 |
| 1987 | .40 | 3.00 |
| 1988 | .70 | 2.90 |
| 1989 | .70 | 3.10 |
| 1990 | .40 | 3.00 |
| 1991 | .10 | 1.60 |
| 1993 | .10 | 5.60 |
| 1994 | .00 | 4.90 |
| 1995 | .00 | 5.50 |
| 1996 | .00 | 6.70 |
| 1997 | .00 | 4.50 |
| 1998 | .00 | 4.40 |
| 1999 | .00 | 4.30 |
| 2000 | .00 | 5.20 |
| 2001 | .00 | 5.00 |
| 2002 | .00 | 4.90 |
| 2003 | .00 | 6.50 |
| 2004 | .00 | 7.00 |
| 2005 | .00 | 5.30 |
| 2006 | .00 | 5.10 |
| 2007 | .00 | 3.30 |
| 2008 | .00 | 5.20 |
| 2009 | .00 | 6.30 |
| 2010 | .00 | 5.20 |
| 2011 | .00 | 6.30 |
| 2012 | .00 | 7.70 |
|
|
