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Loading...
| year | production | consumption |
| 1980 | 283.00 | 295.00 |
| 1981 | 277.00 | 296.00 |
| 1982 | 288.00 | 301.00 |
| 1983 | 286.00 | 297.00 |
| 1984 | 293.00 | 307.00 |
| 1985 | 285.00 | 311.00 |
| 1986 | 376.00 | 397.80 |
| 1987 | 382.00 | 407.80 |
| 1988 | 396.00 | 424.80 |
| 1989 | 414.00 | 446.20 |
| 1990 | 430.00 | 459.70 |
| 1991 | 431.00 | 459.70 |
| 1992 | 448.00 | 467.60 |
| 1993 | 474.00 | 476.70 |
| 1994 | 474.00 | 501.70 |
| 1995 | 461.00 | 483.80 |
| 1996 | 512.00 | 523.80 |
| 1997 | 528.00 | 536.90 |
| 1998 | 529.00 | 538.80 |
| 1999 | 567.00 | 580.70 |
| 2000 | 549.00 | 578.50 |
| 2001 | 554.00 | 606.10 |
| 2002 | 549.00 | 641.00 |
| 2003 | 537.00 | 669.20 |
| 2004 | 553.00 | 693.00 |
| 2005 | 542.00 | 711.20 |
| 2006 | 526.80 | 737.10 |
| 2007 | 515.90 | 776.40 |
| 2008 | 509.90 | 765.80 |
| 2009 | 532.90 | 804.00 |
| 2010 | 544.90 | 819.00 |
| 2011 | 527.90 | 873.80 |
| 2012 | 517.90 | 933.80 |
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