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Loading...
| year | production | consumption |
| 1980 | .00 | .00 |
| 1981 | .00 | .00 |
| 1982 | .00 | .00 |
| 1983 | .00 | .00 |
| 1984 | .00 | .00 |
| 1985 | .00 | .00 |
| 1986 | .00 | .00 |
| 1987 | .00 | .00 |
| 1988 | .00 | .00 |
| 1989 | .00 | .00 |
| 1990 | .00 | .00 |
| 1991 | .00 | .00 |
| 1992 | .00 | .00 |
| 1993 | .00 | .00 |
| 1994 | .00 | .00 |
| 1995 | .00 | .00 |
| 1996 | .00 | .00 |
| 1997 | .00 | .00 |
| 1998 | .00 | 3.60 |
| 1999 | 1.70 | 4.20 |
| 2000 | 3.70 | 4.50 |
| 2001 | 3.90 | 4.50 |
| 2002 | 4.00 | 4.50 |
| 2003 | 4.00 | 4.90 |
| 2004 | 4.00 | 4.90 |
| 2005 | 4.40 | 5.80 |
| 2006 | 4.40 | 4.60 |
| 2007 | 14.00 | 20.00 |
| 2008 | 15.00 | 24.00 |
| 2009 | 20.00 | 26.00 |
| 2010 | 24.00 | 32.00 |
| 2011 | 30.00 | 42.00 |
| 2012 | 33.00 | 41.00 |
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