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Loading...
| year | production | consumption |
| 1980 | 31.00 | 29.00 |
| 1981 | 26.00 | 26.00 |
| 1982 | 18.00 | 23.00 |
| 1983 | 19.00 | 23.00 |
| 1984 | 19.00 | 21.00 |
| 1985 | 18.00 | 20.00 |
| 1986 | 833.60 | 458.70 |
| 1987 | 759.80 | 468.00 |
| 1988 | 825.80 | 468.60 |
| 1989 | 811.40 | 462.80 |
| 1990 | 802.80 | 444.20 |
| 1991 | 832.80 | 431.40 |
| 1992 | 806.80 | 431.60 |
| 1993 | 771.40 | 403.80 |
| 1994 | 743.10 | 429.10 |
| 1995 | 778.50 | 453.20 |
| 1996 | 801.50 | 471.20 |
| 1997 | 819.00 | 469.10 |
| 1998 | 820.30 | 479.30 |
| 1999 | 802.30 | 453.20 |
| 2000 | 856.10 | 452.30 |
| 2001 | 926.50 | 421.50 |
| 2002 | 879.60 | 433.00 |
| 2003 | 814.00 | 372.20 |
| 2004 | 859.20 | 398.30 |
| 2005 | 890.20 | 449.50 |
| 2006 | 916.80 | 462.90 |
| 2007 | 841.40 | 470.60 |
| 2008 | 894.90 | 489.90 |
| 2009 | 896.40 | 466.90 |
| 2010 | 832.80 | 492.80 |
| 2011 | 850.20 | 497.80 |
| 2012 | 834.80 | 491.40 |
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