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Loading...
| year | production | consumption |
| 1980 | 128.00 | 74.00 |
| 1981 | 111.00 | 61.00 |
| 1982 | 86.00 | 65.00 |
| 1983 | 92.00 | 62.00 |
| 1984 | 86.00 | 60.00 |
| 1985 | 89.00 | 58.00 |
| 1986 | 114.00 | 63.00 |
| 1987 | 112.00 | 66.00 |
| 1988 | 114.00 | 68.00 |
| 1989 | 123.00 | 67.00 |
| 1990 | 122.00 | 63.00 |
| 1991 | 136.00 | 63.00 |
| 1992 | 142.00 | 67.00 |
| 1993 | 130.00 | 66.00 |
| 1994 | 132.00 | 66.00 |
| 1995 | 122.00 | 66.00 |
| 1996 | 137.00 | 63.00 |
| 1997 | 141.00 | 59.00 |
| 1998 | 149.00 | 58.00 |
| 1999 | 140.00 | 55.00 |
| 2000 | 123.00 | 52.00 |
| 2001 | 127.00 | 51.00 |
| 2002 | 134.00 | 48.00 |
| 2003 | 136.00 | 49.00 |
| 2004 | 134.00 | 45.00 |
| 2005 | 117.00 | 41.00 |
| 2006 | 124.00 | 34.00 |
| 2007 | 117.00 | 32.00 |
| 2008 | 94.00 | 34.00 |
| 2009 | 89.00 | 33.00 |
| 2010 | 83.00 | 30.00 |
| 2011 | 71.00 | 30.00 |
| 2012 | 75.00 | 28.00 |
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