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Loading...
| year | production | consumption |
| 1980 | 39.00 | 37.00 |
| 1981 | 42.00 | 42.00 |
| 1982 | 38.00 | 43.00 |
| 1983 | 45.00 | 42.00 |
| 1984 | 38.00 | 41.00 |
| 1985 | 40.00 | 41.00 |
| 1986 | 46.00 | 43.00 |
| 1987 | 38.00 | 45.00 |
| 1988 | 44.00 | 49.00 |
| 1989 | 59.00 | 51.00 |
| 1990 | 59.00 | 54.00 |
| 1991 | 49.00 | 57.00 |
| 1992 | 61.00 | 60.00 |
| 1993 | 67.00 | 61.00 |
| 1994 | 86.00 | 64.00 |
| 1995 | 81.00 | 67.00 |
| 1996 | 77.00 | 72.00 |
| 1997 | 80.00 | 77.00 |
| 1998 | 89.00 | 85.00 |
| 1999 | 87.00 | 90.00 |
| 2000 | 80.00 | 101.00 |
| 2001 | 95.00 | 109.00 |
| 2002 | 98.00 | 111.00 |
| 2003 | 102.00 | 112.00 |
| 2004 | 97.00 | 116.00 |
| 2005 | 103.00 | 115.00 |
| 2006 | 103.00 | 112.00 |
| 2007 | 97.00 | 113.00 |
| 2008 | 95.00 | 111.00 |
| 2009 | 83.00 | 112.00 |
| 2010 | 87.00 | 114.00 |
| 2011 | 77.00 | 105.00 |
| 2012 | 83.00 | 96.00 |
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