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Loading...
| year | production | consumption |
| 1980 | .00 | 124.00 |
| 1981 | .00 | 128.00 |
| 1982 | .00 | 125.00 |
| 1983 | .00 | 119.00 |
| 1984 | .00 | 115.00 |
| 1985 | .00 | 110.00 |
| 1986 | .00 | 113.00 |
| 1987 | .00 | 116.00 |
| 1988 | .00 | 121.00 |
| 1989 | .00 | 124.00 |
| 1990 | .00 | 127.00 |
| 1991 | .00 | 134.00 |
| 1992 | .00 | 152.00 |
| 1993 | .00 | 158.00 |
| 1994 | .00 | 180.00 |
| 1995 | .00 | 186.00 |
| 1996 | .00 | 183.00 |
| 1997 | .00 | 185.00 |
| 1998 | .00 | 192.00 |
| 1999 | .00 | 264.00 |
| 2000 | .00 | 245.00 |
| 2001 | .00 | 245.00 |
| 2002 | .00 | 273.00 |
| 2003 | .00 | 277.00 |
| 2004 | .00 | 319.00 |
| 2005 | .00 | 331.00 |
| 2006 | .00 | 318.00 |
| 2007 | .00 | 350.00 |
| 2008 | .00 | 315.00 |
| 2009 | .00 | 384.00 |
| 2010 | .00 | 431.00 |
| 2011 | .00 | 384.00 |
| 2012 | .00 | 354.00 |
| 2013 | .00 | 360.00 |
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