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Loading...
| year | production | consumption |
| 1980 | 94.00 | 86.00 |
| 1981 | 100.00 | 90.00 |
| 1982 | 97.00 | 92.00 |
| 1983 | 107.00 | 103.00 |
| 1984 | 121.00 | 112.00 |
| 1985 | 134.00 | 122.00 |
| 1986 | 136.00 | 121.00 |
| 1987 | 143.00 | 129.00 |
| 1988 | 142.00 | 130.00 |
| 1989 | 141.00 | 131.00 |
| 1990 | 142.00 | 130.00 |
| 1991 | 142.00 | 132.00 |
| 1992 | 141.00 | 130.00 |
| 1993 | 141.00 | 130.00 |
| 1994 | 138.00 | 129.00 |
| 1995 | 144.00 | 132.00 |
| 1996 | 136.00 | 131.00 |
| 1997 | 145.00 | 132.00 |
| 1998 | 154.00 | 133.00 |
| 1999 | 150.00 | 132.00 |
| 2000 | 141.00 | 135.00 |
| 2001 | 157.00 | 138.00 |
| 2002 | 142.00 | 136.00 |
| 2003 | 131.00 | 133.00 |
| 2004 | 148.00 | 135.00 |
| 2005 | 155.00 | 135.00 |
| 2006 | 140.00 | 136.00 |
| 2007 | 145.00 | 136.00 |
| 2008 | 145.00 | 133.00 |
| 2009 | 133.00 | 128.00 |
| 2010 | 144.00 | 136.00 |
| 2011 | 146.00 | 128.00 |
| 2012 | 162.00 | 131.00 |
| 2013 | 149.00 | 129.00 |
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