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Loading...
| year | production | consumption |
| 1980 | 31.00 | 33.00 |
| 1981 | 42.00 | 39.00 |
| 1982 | 38.00 | 43.00 |
| 1983 | 38.00 | 43.00 |
| 1984 | 38.00 | 39.00 |
| 1985 | 45.00 | 42.00 |
| 1986 | 45.00 | 43.00 |
| 1987 | 54.00 | 46.00 |
| 1988 | 70.00 | 49.00 |
| 1989 | 73.00 | 54.00 |
| 1990 | 78.00 | 56.00 |
| 1991 | 72.00 | 58.00 |
| 1992 | 83.00 | 60.00 |
| 1993 | 80.00 | 61.00 |
| 1994 | 82.00 | 62.00 |
| 1995 | 82.00 | 64.00 |
| 1996 | 78.00 | 68.00 |
| 1997 | 84.00 | 70.00 |
| 1998 | 85.00 | 73.00 |
| 1999 | 74.00 | 74.00 |
| 2000 | 87.00 | 76.00 |
| 2001 | 87.00 | 78.00 |
| 2002 | 88.00 | 82.00 |
| 2003 | 85.00 | 85.00 |
| 2004 | 84.00 | 87.00 |
| 2005 | 94.00 | 91.00 |
| 2006 | 100.00 | 92.00 |
| 2007 | 100.00 | 96.00 |
| 2008 | 98.00 | 94.00 |
| 2009 | 94.00 | 94.00 |
| 2010 | 101.00 | 86.00 |
| 2011 | 88.00 | 77.00 |
| 2012 | 110.00 | 68.00 |
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