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Loading...
| year | production | consumption |
| 1980 | .00 | 347.00 |
| 1981 | .00 | 624.00 |
| 1982 | .00 | 550.00 |
| 1983 | .00 | 503.00 |
| 1984 | .00 | 711.00 |
| 1985 | .00 | 705.00 |
| 1986 | .00 | 603.00 |
| 1987 | .00 | 574.00 |
| 1988 | .00 | 498.00 |
| 1989 | .00 | 516.00 |
| 1990 | .00 | 540.00 |
| 1991 | .00 | 448.00 |
| 1992 | .00 | 303.00 |
| 1993 | .00 | 250.00 |
| 1994 | .00 | 259.00 |
| 1995 | .00 | 279.00 |
| 1996 | .00 | 206.00 |
| 1997 | .00 | 154.00 |
| 1998 | .00 | 126.00 |
| 1999 | .00 | 129.00 |
| 2000 | .00 | 197.00 |
| 2001 | .00 | 217.00 |
| 2002 | .00 | 190.00 |
| 2003 | .00 | 204.00 |
| 2004 | .00 | 200.00 |
| 2005 | .00 | 239.00 |
| 2006 | .00 | 243.00 |
| 2007 | .00 | 294.00 |
| 2008 | .00 | 261.00 |
| 2009 | .00 | 244.00 |
| 2010 | .00 | 251.00 |
| 2011 | .00 | 235.00 |
| 2012 | .00 | 207.00 |
| 2013 | .00 | 234.00 |
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