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Loading...
| year | production | consumption |
| 1980 | 387.00 | 446.00 |
| 1981 | 399.00 | 436.00 |
| 1982 | 446.00 | 430.00 |
| 1983 | 490.00 | 436.00 |
| 1984 | 513.00 | 467.00 |
| 1985 | 515.00 | 472.00 |
| 1986 | 541.00 | 497.00 |
| 1987 | 571.00 | 514.00 |
| 1988 | 610.00 | 537.00 |
| 1989 | 631.00 | 554.00 |
| 1990 | 619.00 | 563.00 |
| 1991 | 643.00 | 556.00 |
| 1992 | 646.00 | 555.00 |
| 1993 | 657.00 | 550.00 |
| 1994 | 638.00 | 529.00 |
| 1995 | 631.00 | 508.00 |
| 1996 | 648.00 | 517.00 |
| 1997 | 654.00 | 515.00 |
| 1998 | 634.00 | 506.00 |
| 1999 | 592.00 | 523.00 |
| 2000 | 552.00 | 499.00 |
| 2001 | 497.00 | 485.00 |
| 2002 | 531.00 | 482.00 |
| 2003 | 524.00 | 461.00 |
| 2004 | 568.00 | 450.00 |
| 2005 | 524.00 | 435.00 |
| 2006 | 496.00 | 422.00 |
| 2007 | 493.00 | 411.00 |
| 2008 | 471.00 | 386.00 |
| 2009 | 473.00 | 361.00 |
| 2010 | 466.00 | 349.00 |
| 2011 | 461.00 | 334.00 |
| 2012 | 407.00 | 320.00 |
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