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Loading...
| year | production | consumption |
| 1980 | 453.00 | 440.00 |
| 1981 | 418.00 | 362.00 |
| 1982 | 422.00 | 377.00 |
| 1983 | 431.00 | 368.00 |
| 1984 | 439.00 | 375.00 |
| 1985 | 444.00 | 379.00 |
| 1986 | 460.00 | 385.00 |
| 1987 | 438.00 | 376.00 |
| 1988 | 488.00 | 395.00 |
| 1989 | 476.00 | 413.00 |
| 1990 | 478.00 | 414.00 |
| 1991 | 533.00 | 419.00 |
| 1992 | 523.00 | 427.00 |
| 1993 | 559.00 | 438.00 |
| 1994 | 555.00 | 455.00 |
| 1995 | 556.00 | 459.00 |
| 1996 | 590.00 | 484.00 |
| 1997 | 589.00 | 496.00 |
| 1998 | 571.00 | 502.00 |
| 1999 | 536.00 | 504.00 |
| 2000 | 589.00 | 511.00 |
| 2001 | 548.00 | 512.00 |
| 2002 | 580.00 | 504.00 |
| 2003 | 567.00 | 518.00 |
| 2004 | 588.00 | 527.00 |
| 2005 | 586.00 | 557.00 |
| 2006 | 533.00 | 569.00 |
| 2007 | 539.00 | 584.00 |
| 2008 | 546.00 | 570.00 |
| 2009 | 520.00 | 555.00 |
| 2010 | 510.00 | 566.00 |
| 2011 | 522.00 | 563.00 |
| 2012 | 503.00 | 576.00 |
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