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Loading...
| year | production | consumption |
| 1980 | 7.70 | 103.00 |
| 1981 | 7.70 | 301.00 |
| 1982 | 7.70 | 1,536.00 |
| 1983 | 7.70 | 1,311.00 |
| 1984 | 7.70 | 1,351.00 |
| 1985 | 8.80 | 1,351.00 |
| 1986 | 9.90 | 1,646.00 |
| 1987 | 8.80 | 1,780.00 |
| 1988 | 11.00 | 1,781.00 |
| 1989 | 17.00 | 1,608.00 |
| 1990 | 11.00 | 1,246.00 |
| 1991 | 17.00 | 1,251.00 |
| 1992 | 17.00 | 1,157.00 |
| 1993 | 22.00 | 909.00 |
| 1994 | 22.00 | 923.00 |
| 1995 | 24.00 | 553.00 |
| 1996 | 13.00 | 364.00 |
| 1997 | 12.00 | 597.00 |
| 1998 | 8.80 | 884.00 |
| 1999 | 5.50 | 804.00 |
| 2000 | .00 | 759.00 |
| 2001 | .00 | 819.00 |
| 2002 | .00 | 1,074.00 |
| 2003 | .00 | 1,074.00 |
| 2004 | .00 | 678.00 |
| 2005 | .00 | 859.00 |
| 2006 | .00 | 955.00 |
| 2007 | .00 | 944.00 |
| 2008 | .00 | 944.00 |
| 2009 | .00 | 320.00 |
| 2010 | .00 | .00 |
| 2011 | .00 | .00 |
| 2012 | .00 | .00 |
| 2013 | .00 | 43.00 |
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