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Loading...
| year | production | consumption |
| 1980 | 161.00 | 153.00 |
| 1981 | 161.00 | 154.00 |
| 1982 | 159.00 | 166.00 |
| 1983 | 153.00 | 149.00 |
| 1984 | 160.00 | 167.00 |
| 1985 | 148.70 | 168.00 |
| 1986 | 359.00 | 348.30 |
| 1987 | 336.00 | 365.00 |
| 1988 | 360.00 | 392.60 |
| 1989 | 380.00 | 422.10 |
| 1990 | 406.00 | 453.70 |
| 1991 | 372.00 | 465.50 |
| 1992 | 428.00 | 499.70 |
| 1993 | 417.00 | 530.70 |
| 1994 | 438.00 | 551.50 |
| 1995 | 457.60 | 597.30 |
| 1996 | 472.60 | 616.50 |
| 1997 | 492.70 | 644.70 |
| 1998 | 470.60 | 631.40 |
| 1999 | 539.60 | 648.10 |
| 2000 | 553.60 | 697.80 |
| 2001 | 558.60 | 728.10 |
| 2002 | 553.00 | 773.40 |
| 2003 | 545.00 | 782.40 |
| 2004 | 558.60 | 840.90 |
| 2005 | 550.60 | 864.00 |
| 2006 | 480.10 | 860.30 |
| 2007 | 497.60 | 851.70 |
| 2008 | 511.10 | 883.70 |
| 2009 | 301.30 | 891.90 |
| 2010 | 547.30 | 974.20 |
| 2011 | 593.30 | 1,022.10 |
| 2012 | 611.30 | 1,104.10 |
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