|
Loading...
| year | production | consumption |
| 1986 | 1.30 | 1.30 |
| 1987 | 1.40 | .30 |
| 1988 | 1.50 | 1.70 |
| 1989 | 1.60 | 1.80 |
| 1990 | 2.00 | 2.00 |
| 1991 | 1.70 | 2.10 |
| 1992 | 3.10 | 2.20 |
| 1993 | .60 | 2.30 |
| 1994 | .00 | 4.50 |
| 1995 | 1.00 | 1.90 |
| 1996 | 1.20 | 2.80 |
| 1997 | 2.00 | 3.30 |
| 1998 | 2.70 | 3.40 |
| 1999 | 2.30 | 3.80 |
| 2000 | 2.60 | 3.70 |
| 2001 | 2.70 | 3.70 |
| 2002 | 2.00 | 3.60 |
| 2003 | 2.10 | 3.10 |
| 2004 | 2.80 | 2.80 |
| 2005 | 2.90 | 2.70 |
| 2006 | 2.50 | 2.90 |
| 2007 | 2.10 | 3.30 |
| 2008 | 2.90 | 3.00 |
| 2009 | 3.20 | 4.10 |
| 2010 | 2.60 | 4.20 |
| 2011 | 2.10 | 4.40 |
| 2012 | 2.80 | 4.60 |
|
|
