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Loading...
| year | production | consumption |
| 1980 | 102.00 | 108.00 |
| 1981 | 85.00 | 74.00 |
| 1982 | 80.00 | 68.00 |
| 1983 | 75.00 | 68.00 |
| 1984 | 56.30 | 78.00 |
| 1985 | 58.50 | 62.00 |
| 1986 | 132.80 | 127.00 |
| 1987 | 226.80 | 133.10 |
| 1988 | 236.10 | 128.10 |
| 1989 | 224.20 | 130.10 |
| 1990 | 254.10 | 148.80 |
| 1991 | 264.00 | 150.50 |
| 1992 | 282.50 | 152.50 |
| 1993 | 276.00 | 151.20 |
| 1994 | 270.30 | 139.00 |
| 1995 | 277.50 | 135.40 |
| 1996 | 213.10 | 133.90 |
| 1997 | 257.90 | 179.40 |
| 1998 | 247.10 | 174.60 |
| 1999 | 248.20 | 173.30 |
| 2000 | 250.60 | 182.40 |
| 2001 | 244.10 | 164.30 |
| 2002 | 253.80 | 185.50 |
| 2003 | 232.50 | 182.90 |
| 2004 | 210.40 | 149.80 |
| 2005 | 227.00 | 171.10 |
| 2006 | 217.10 | 179.60 |
| 2007 | 201.40 | 182.30 |
| 2008 | 201.00 | 194.30 |
| 2009 | 343.90 | 175.10 |
| 2010 | 216.80 | 156.90 |
| 2011 | 190.90 | 150.90 |
| 2012 | 184.90 | 144.50 |
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