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Loading...
| year | production | consumption |
| 1980 | 71.00 | 81.00 |
| 1981 | 71.00 | 63.00 |
| 1982 | 70.00 | 63.00 |
| 1983 | 69.00 | 61.00 |
| 1984 | 71.00 | 60.00 |
| 1985 | 74.00 | 64.00 |
| 1986 | 74.00 | 68.00 |
| 1987 | 92.00 | 70.00 |
| 1988 | 86.00 | 67.00 |
| 1989 | 89.00 | 67.00 |
| 1990 | 121.00 | 66.00 |
| 1991 | 120.00 | 63.00 |
| 1992 | 128.00 | 63.00 |
| 1993 | 132.00 | 67.00 |
| 1994 | 140.00 | 69.00 |
| 1995 | 122.00 | 72.00 |
| 1996 | 136.00 | 81.00 |
| 1997 | 144.00 | 81.00 |
| 1998 | 139.00 | 84.00 |
| 1999 | 148.00 | 88.00 |
| 2000 | 141.00 | 79.00 |
| 2001 | 132.00 | 82.00 |
| 2002 | 123.00 | 84.00 |
| 2003 | 136.00 | 84.00 |
| 2004 | 127.00 | 82.00 |
| 2005 | 140.00 | 84.00 |
| 2006 | 144.00 | 87.00 |
| 2007 | 140.00 | 92.00 |
| 2008 | 125.00 | 89.00 |
| 2009 | 126.00 | 93.00 |
| 2010 | 119.00 | 100.00 |
| 2011 | 136.00 | 97.00 |
| 2012 | 128.00 | 94.00 |
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