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Loading...
| year | production | consumption |
| 1980 | 499.00 | 498.00 |
| 1981 | 448.00 | 456.00 |
| 1982 | 397.00 | 422.00 |
| 1983 | 388.00 | 402.00 |
| 1984 | 405.00 | 394.00 |
| 1985 | 392.00 | 392.00 |
| 1986 | 394.00 | 383.00 |
| 1987 | 411.00 | 385.00 |
| 1988 | 440.00 | 404.00 |
| 1989 | 453.00 | 418.00 |
| 1990 | 463.00 | 401.00 |
| 1991 | 449.00 | 373.00 |
| 1992 | 431.00 | 372.00 |
| 1993 | 465.00 | 390.00 |
| 1994 | 480.00 | 414.00 |
| 1995 | 472.00 | 424.00 |
| 1996 | 515.00 | 446.00 |
| 1997 | 526.00 | 464.00 |
| 1998 | 519.00 | 451.00 |
| 1999 | 545.00 | 468.00 |
| 2000 | 563.00 | 484.00 |
| 2001 | 575.00 | 461.00 |
| 2002 | 586.00 | 450.00 |
| 2003 | 623.00 | 462.00 |
| 2004 | 631.00 | 471.00 |
| 2005 | 618.00 | 538.00 |
| 2006 | 615.00 | 531.00 |
| 2007 | 624.00 | 560.00 |
| 2008 | 617.00 | 557.00 |
| 2009 | 602.00 | 514.00 |
| 2010 | 618.00 | 563.00 |
| 2011 | 604.00 | 591.00 |
| 2012 | 627.00 | 571.00 |
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