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Loading...
| year | production | consumption |
| 1980 | 237.00 | 418.00 |
| 1981 | 231.00 | 412.00 |
| 1982 | 207.00 | 402.00 |
| 1983 | 204.00 | 411.00 |
| 1984 | 227.00 | 433.00 |
| 1985 | 238.00 | 443.00 |
| 1986 | 218.00 | 464.00 |
| 1987 | 215.00 | 474.00 |
| 1988 | 212.00 | 469.00 |
| 1989 | 200.00 | 461.00 |
| 1990 | 145.00 | 427.00 |
| 1991 | 154.00 | 399.00 |
| 1992 | 148.00 | 373.00 |
| 1993 | 182.00 | 393.00 |
| 1994 | 173.00 | 393.00 |
| 1995 | 179.00 | 416.00 |
| 1996 | 177.00 | 463.00 |
| 1997 | 180.00 | 463.00 |
| 1998 | 181.00 | 462.00 |
| 1999 | 176.00 | 438.00 |
| 2000 | 184.00 | 473.00 |
| 2001 | 193.00 | 482.00 |
| 2002 | 196.00 | 474.00 |
| 2003 | 199.00 | 517.00 |
| 2004 | 210.00 | 547.00 |
| 2005 | 214.00 | 573.00 |
| 2006 | 212.00 | 572.00 |
| 2007 | 213.00 | 571.00 |
| 2008 | 203.00 | 575.00 |
| 2009 | 207.00 | 565.00 |
| 2010 | 215.00 | 606.00 |
| 2011 | 221.00 | 607.00 |
| 2012 | 223.00 | 639.00 |
| 2013 | 219.00 | 644.00 |
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