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Loading...
| year | production | consumption |
| 1980 | 217.00 | 344.00 |
| 1981 | 210.00 | 350.00 |
| 1982 | 232.00 | 368.00 |
| 1983 | 227.00 | 367.00 |
| 1984 | 242.00 | 382.00 |
| 1985 | 264.00 | 395.00 |
| 1986 | 252.00 | 417.00 |
| 1987 | 248.00 | 417.00 |
| 1988 | 221.00 | 411.00 |
| 1989 | 214.00 | 418.00 |
| 1990 | 172.00 | 394.00 |
| 1991 | 176.00 | 393.00 |
| 1992 | 179.00 | 349.00 |
| 1993 | 178.00 | 372.00 |
| 1994 | 171.00 | 375.00 |
| 1995 | 173.00 | 407.00 |
| 1996 | 165.00 | 453.00 |
| 1997 | 154.00 | 431.00 |
| 1998 | 137.00 | 433.00 |
| 1999 | 120.00 | 437.00 |
| 2000 | 113.00 | 425.00 |
| 2001 | 114.00 | 472.00 |
| 2002 | 110.00 | 473.00 |
| 2003 | 104.00 | 515.00 |
| 2004 | 108.00 | 510.00 |
| 2005 | 107.00 | 529.00 |
| 2006 | 109.00 | 502.00 |
| 2007 | 92.00 | 468.00 |
| 2008 | 93.00 | 463.00 |
| 2009 | 105.00 | 400.00 |
| 2010 | 102.00 | 428.00 |
| 2011 | 98.00 | 408.00 |
| 2012 | 79.00 | 358.00 |
| 2013 | 69.00 | 330.00 |
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