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Loading...
| year | production | consumption |
| 1980 | 59.00 | 82.00 |
| 1981 | 72.00 | 88.00 |
| 1982 | 94.00 | 97.00 |
| 1983 | 94.00 | 106.00 |
| 1984 | 105.00 | 108.00 |
| 1985 | 104.00 | 114.00 |
| 1986 | 116.00 | 127.00 |
| 1987 | 134.00 | 145.00 |
| 1988 | 134.00 | 144.00 |
| 1989 | 126.00 | 144.00 |
| 1990 | 134.00 | 154.00 |
| 1991 | 131.00 | 146.00 |
| 1992 | 134.00 | 142.00 |
| 1993 | 149.00 | 172.00 |
| 1994 | 152.00 | 162.00 |
| 1995 | 159.00 | 180.00 |
| 1996 | 151.00 | 186.00 |
| 1997 | 149.00 | 162.00 |
| 1998 | 163.00 | 138.00 |
| 1999 | 158.00 | 169.00 |
| 2000 | 135.00 | 185.00 |
| 2001 | 150.00 | 179.00 |
| 2002 | 158.00 | 196.00 |
| 2003 | 165.00 | 201.00 |
| 2004 | 156.00 | 218.00 |
| 2005 | 155.00 | 217.00 |
| 2006 | 154.00 | 246.00 |
| 2007 | 143.00 | 281.00 |
| 2008 | 144.00 | 300.00 |
| 2009 | 104.00 | 281.00 |
| 2010 | 109.00 | 300.00 |
| 2011 | 144.00 | 311.00 |
| 2012 | 160.00 | 328.00 |
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