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Loading...
| year | production | consumption |
| 1980 | 211.00 | 42.00 |
| 1981 | 240.00 | 39.00 |
| 1982 | 180.00 | 30.00 |
| 1983 | 160.00 | 26.00 |
| 1984 | 170.00 | 25.00 |
| 1985 | 175.00 | 24.00 |
| 1986 | 168.00 | 23.00 |
| 1987 | 157.00 | 21.00 |
| 1988 | 157.00 | 18.00 |
| 1989 | 154.00 | 21.00 |
| 1990 | 150.00 | 20.00 |
| 1991 | 151.00 | 21.00 |
| 1992 | 137.00 | 22.00 |
| 1993 | 135.00 | 21.00 |
| 1994 | 132.00 | 24.00 |
| 1995 | 131.00 | 22.00 |
| 1996 | 130.00 | 20.00 |
| 1997 | 124.00 | 22.00 |
| 1998 | 123.00 | 22.00 |
| 1999 | 125.00 | 23.00 |
| 2000 | 122.00 | 25.00 |
| 2001 | 113.00 | 29.00 |
| 2002 | 122.00 | 28.00 |
| 2003 | 134.00 | 31.00 |
| 2004 | 123.00 | 32.00 |
| 2005 | 145.00 | 35.00 |
| 2006 | 143.00 | 37.00 |
| 2007 | 121.00 | 39.00 |
| 2008 | 114.00 | 41.00 |
| 2009 | 107.00 | 37.00 |
| 2010 | 98.00 | 41.00 |
| 2011 | 92.00 | 41.00 |
| 2012 | 82.00 | 43.00 |
| 2013 | 81.00 | 42.00 |
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