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Loading...
| year | production | consumption |
| 1980 | 180.00 | 180.00 |
| 1981 | 110.00 | 110.00 |
| 1982 | 120.00 | 88.00 |
| 1983 | 140.00 | 112.00 |
| 1984 | 162.00 | 122.00 |
| 1985 | 180.00 | 143.00 |
| 1986 | 198.00 | 168.00 |
| 1987 | 189.00 | 161.00 |
| 1988 | 194.00 | 157.00 |
| 1989 | 212.00 | 165.00 |
| 1990 | 219.00 | 174.00 |
| 1991 | 231.00 | 175.00 |
| 1992 | 239.00 | 174.00 |
| 1993 | 225.00 | 168.00 |
| 1994 | 226.00 | 173.00 |
| 1995 | 224.00 | 171.00 |
| 1996 | 227.00 | 184.00 |
| 1997 | 232.00 | 192.00 |
| 1998 | 225.00 | 192.00 |
| 1999 | 184.00 | 150.00 |
| 2000 | 212.00 | 184.00 |
| 2001 | 218.00 | 190.00 |
| 2002 | 219.00 | 197.00 |
| 2003 | 194.00 | 168.00 |
| 2004 | 285.00 | 209.00 |
| 2005 | 399.00 | 206.00 |
| 2006 | 466.00 | 169.00 |
| 2007 | 540.00 | 188.00 |
| 2008 | 562.00 | 194.00 |
| 2009 | 562.00 | 212.00 |
| 2010 | 594.00 | 249.00 |
| 2011 | 277.00 | 192.00 |
| 2012 | 431.00 | 202.00 |
| 2013 | 424.00 | 229.00 |
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