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Loading...
| year | production | consumption |
| 1980 | 342.00 | 323.00 |
| 1981 | 301.00 | 265.00 |
| 1982 | 243.00 | 219.00 |
| 1983 | 207.00 | 163.00 |
| 1984 | 151.00 | 143.00 |
| 1985 | 122.00 | 116.00 |
| 1986 | 114.00 | 123.00 |
| 1987 | 122.00 | 129.00 |
| 1988 | 139.00 | 151.00 |
| 1989 | 145.00 | 187.00 |
| 1990 | 150.00 | 173.00 |
| 1991 | 138.00 | 157.00 |
| 1992 | 127.00 | 155.00 |
| 1993 | 123.00 | 137.00 |
| 1994 | 115.00 | 126.00 |
| 1995 | 108.00 | 114.00 |
| 1996 | 116.00 | 107.00 |
| 1997 | 124.00 | 122.00 |
| 1998 | 132.00 | 151.00 |
| 1999 | 117.00 | 132.00 |
| 2000 | 119.00 | 131.00 |
| 2001 | 132.00 | 162.00 |
| 2002 | 124.00 | 138.00 |
| 2003 | 145.00 | 173.00 |
| 2004 | 157.00 | 168.00 |
| 2005 | 149.00 | 145.00 |
| 2006 | 140.00 | 113.00 |
| 2007 | 153.00 | 123.00 |
| 2008 | 142.00 | 110.00 |
| 2009 | 115.00 | 103.00 |
| 2010 | 121.00 | 83.00 |
| 2011 | 120.00 | 64.00 |
| 2012 | 131.00 | 64.00 |
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