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Loading...
| year | production | consumption |
| 1980 | 164.00 | 110.00 |
| 1981 | 166.00 | 120.00 |
| 1982 | 160.00 | 121.00 |
| 1983 | 167.00 | 139.00 |
| 1984 | 170.00 | 154.00 |
| 1985 | 178.00 | 164.00 |
| 1986 | 194.00 | 163.00 |
| 1987 | 230.00 | 180.00 |
| 1988 | 265.00 | 192.00 |
| 1989 | 340.00 | 198.00 |
| 1990 | 388.00 | 205.00 |
| 1991 | 492.00 | 178.00 |
| 1992 | 481.00 | 185.00 |
| 1993 | 554.00 | 209.00 |
| 1994 | 560.00 | 224.00 |
| 1995 | 575.00 | 226.00 |
| 1996 | 582.00 | 229.00 |
| 1997 | 561.00 | 240.00 |
| 1998 | 553.00 | 248.00 |
| 1999 | 538.00 | 256.00 |
| 2000 | 523.00 | 256.00 |
| 2001 | 484.00 | 254.00 |
| 2002 | 472.00 | 256.00 |
| 2003 | 464.00 | 257.00 |
| 2004 | 446.00 | 258.00 |
| 2005 | 432.00 | 259.00 |
| 2006 | 406.00 | 261.00 |
| 2007 | 380.00 | 281.00 |
| 2008 | 369.00 | 347.00 |
| 2009 | 368.00 | 334.00 |
| 2010 | 383.00 | 309.00 |
| 2011 | 340.00 | 294.00 |
| 2012 | 145.00 | 221.00 |
| 2013 | 58.00 | 224.00 |
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