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Loading...
| year | production | consumption |
| 1980 | .00 | 132.00 |
| 1981 | .00 | 90.00 |
| 1982 | .00 | 72.00 |
| 1983 | .00 | 107.00 |
| 1984 | .00 | 114.00 |
| 1985 | .00 | 195.00 |
| 1986 | .00 | 193.00 |
| 1987 | .00 | 171.00 |
| 1988 | .00 | 187.00 |
| 1989 | .00 | 228.00 |
| 1990 | .00 | 181.00 |
| 1991 | .00 | 194.00 |
| 1992 | .00 | 187.00 |
| 1993 | .00 | 187.00 |
| 1994 | .00 | 182.00 |
| 1995 | .00 | 182.00 |
| 1996 | .00 | 185.00 |
| 1997 | .00 | 125.00 |
| 1998 | .00 | 132.00 |
| 1999 | .00 | 122.00 |
| 2000 | .00 | 280.00 |
| 2001 | .00 | 285.00 |
| 2002 | .00 | 304.00 |
| 2003 | .00 | 345.00 |
| 2004 | .00 | 310.00 |
| 2005 | .00 | 287.00 |
| 2006 | .00 | 312.00 |
| 2007 | .00 | 269.00 |
| 2008 | .00 | 294.00 |
| 2009 | .00 | 279.00 |
| 2010 | .00 | 331.00 |
| 2011 | .00 | 331.00 |
| 2012 | .00 | 331.00 |
| 2013 | .00 | 628.00 |
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