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Loading...
| year | production | consumption |
| 1980 | 515.00 | 494.00 |
| 1981 | 513.00 | 489.00 |
| 1982 | 495.00 | 488.00 |
| 1983 | 469.00 | 489.00 |
| 1984 | 469.00 | 552.00 |
| 1985 | 464.00 | 546.00 |
| 1986 | 556.00 | 554.00 |
| 1987 | 523.00 | 576.00 |
| 1988 | 516.00 | 575.00 |
| 1989 | 524.00 | 577.00 |
| 1990 | 582.00 | 566.00 |
| 1991 | 607.00 | 568.00 |
| 1992 | 622.00 | 552.00 |
| 1993 | 637.00 | 541.00 |
| 1994 | 653.00 | 499.00 |
| 1995 | 640.00 | 516.00 |
| 1996 | 642.00 | 509.00 |
| 1997 | 702.00 | 514.00 |
| 1998 | 745.00 | 531.00 |
| 1999 | 690.00 | 551.00 |
| 2000 | 723.00 | 562.00 |
| 2001 | 763.00 | 580.00 |
| 2002 | 795.00 | 600.00 |
| 2003 | 791.00 | 598.00 |
| 2004 | 795.00 | 639.00 |
| 2005 | 819.00 | 649.00 |
| 2006 | 804.00 | 657.00 |
| 2007 | 838.00 | 658.00 |
| 2008 | 818.00 | 642.00 |
| 2009 | 774.00 | 617.00 |
| 2010 | 809.00 | 614.00 |
| 2011 | 777.00 | 609.00 |
| 2012 | 738.00 | 570.00 |
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