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Loading...
| year | production | consumption |
| 1980 | 60.00 | 2.00 |
| 1981 | 79.00 | 3.00 |
| 1982 | 81.00 | 5.00 |
| 1983 | 85.00 | 5.00 |
| 1984 | 85.00 | 5.00 |
| 1985 | 105.00 | .00 |
| 1986 | 105.00 | .00 |
| 1987 | 99.00 | 22.00 |
| 1988 | 106.00 | 70.00 |
| 1989 | 104.00 | 68.00 |
| 1990 | 11.00 | 11.00 |
| 1991 | 11.00 | 11.00 |
| 1992 | 11.00 | 11.00 |
| 1993 | 11.00 | 11.00 |
| 1994 | 11.00 | 11.00 |
| 1995 | 7.10 | 7.10 |
| 1996 | 8.10 | 8.10 |
| 1997 | 8.10 | 8.10 |
| 1998 | 8.10 | 8.10 |
| 1999 | 8.10 | 8.10 |
| 2000 | 8.10 | 8.10 |
| 2001 | 1.80 | 1.80 |
| 2002 | 1.80 | 1.80 |
| 2003 | .70 | .70 |
| 2004 | .70 | .70 |
| 2005 | .70 | .70 |
| 2006 | .70 | .70 |
| 2007 | 1.40 | 1.40 |
| 2008 | 1.80 | 1.80 |
| 2009 | 1.10 | 1.10 |
| 2010 | 4.90 | 4.90 |
| 2011 | 4.90 | 4.90 |
| 2012 | 5.60 | 5.60 |
| 2013 | 5.60 | 5.60 |
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