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Loading...
| year | production | consumption |
| 1980 | 75.00 | 74.00 |
| 1981 | 81.00 | 67.00 |
| 1982 | 81.00 | 74.00 |
| 1983 | 79.00 | 75.00 |
| 1984 | 78.00 | 79.00 |
| 1985 | 67.00 | 81.00 |
| 1986 | 76.00 | 82.00 |
| 1987 | 79.00 | 92.00 |
| 1988 | 70.00 | 97.00 |
| 1989 | 76.00 | 104.00 |
| 1990 | 74.00 | 107.00 |
| 1991 | 67.00 | 111.00 |
| 1992 | 77.00 | 111.00 |
| 1993 | 67.00 | 112.00 |
| 1994 | 76.00 | 115.00 |
| 1995 | 81.00 | 123.00 |
| 1996 | 97.00 | 133.00 |
| 1997 | 105.00 | 135.00 |
| 1998 | 113.00 | 143.00 |
| 1999 | 99.00 | 140.00 |
| 2000 | 115.00 | 144.00 |
| 2001 | 111.00 | 149.00 |
| 2002 | 115.00 | 154.00 |
| 2003 | 124.00 | 170.00 |
| 2004 | 109.00 | 154.00 |
| 2005 | 116.00 | 161.00 |
| 2006 | 133.00 | 164.00 |
| 2007 | 136.00 | 156.00 |
| 2008 | 134.00 | 149.00 |
| 2009 | 133.00 | 144.00 |
| 2010 | 141.00 | 131.00 |
| 2011 | 119.00 | 132.00 |
| 2012 | 161.00 | 99.00 |
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