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Loading...
| year | production | consumption |
| 1980 | 104.00 | 119.00 |
| 1981 | 87.00 | 106.00 |
| 1982 | 90.00 | 102.00 |
| 1983 | 94.00 | 113.00 |
| 1984 | 96.00 | 113.00 |
| 1985 | 99.00 | 116.00 |
| 1986 | 99.00 | 121.00 |
| 1987 | 102.00 | 123.00 |
| 1988 | 105.00 | 128.00 |
| 1989 | 99.00 | 122.00 |
| 1990 | 81.00 | 101.00 |
| 1991 | 75.00 | 96.00 |
| 1992 | 90.00 | 98.00 |
| 1993 | 100.00 | 101.00 |
| 1994 | 102.00 | 101.00 |
| 1995 | 100.00 | 105.00 |
| 1996 | 115.00 | 133.00 |
| 1997 | 122.00 | 144.00 |
| 1998 | 133.00 | 148.00 |
| 1999 | 143.00 | 153.00 |
| 2000 | 157.00 | 149.00 |
| 2001 | 154.00 | 152.00 |
| 2002 | 133.00 | 151.00 |
| 2003 | 142.00 | 165.00 |
| 2004 | 153.00 | 180.00 |
| 2005 | 153.00 | 195.00 |
| 2006 | 171.00 | 205.00 |
| 2007 | 180.00 | 223.00 |
| 2008 | 198.00 | 241.00 |
| 2009 | 206.00 | 244.00 |
| 2010 | 224.00 | 264.00 |
| 2011 | 236.00 | 274.00 |
| 2012 | 244.00 | 261.00 |
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