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Loading...
| year | production | consumption |
| 1980 | 105.00 | 132.00 |
| 1981 | 103.00 | 116.00 |
| 1982 | 132.00 | 123.00 |
| 1983 | 123.00 | 123.00 |
| 1984 | 119.00 | 117.00 |
| 1985 | 120.00 | 121.00 |
| 1986 | 125.00 | 116.00 |
| 1987 | 150.00 | 124.00 |
| 1988 | 165.00 | 110.00 |
| 1989 | 147.00 | 119.00 |
| 1990 | 154.00 | 120.00 |
| 1991 | 157.00 | 115.00 |
| 1992 | 157.00 | 129.00 |
| 1993 | 164.00 | 138.00 |
| 1994 | 152.00 | 130.00 |
| 1995 | 166.00 | 144.00 |
| 1996 | 158.00 | 151.00 |
| 1997 | 155.00 | 149.00 |
| 1998 | 145.00 | 144.00 |
| 1999 | 148.00 | 138.00 |
| 2000 | 141.00 | 142.00 |
| 2001 | 149.00 | 136.00 |
| 2002 | 141.00 | 147.00 |
| 2003 | 142.00 | 144.00 |
| 2004 | 138.00 | 131.00 |
| 2005 | 127.00 | 118.00 |
| 2006 | 128.00 | 100.00 |
| 2007 | 113.00 | 77.00 |
| 2008 | 95.00 | 65.00 |
| 2009 | 53.00 | 45.00 |
| 2010 | 49.00 | 20.00 |
| 2011 | 44.00 | 19.00 |
| 2012 | 28.00 | 20.00 |
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