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Loading...
| year | production | consumption |
| 1980 | 5.00 | 5.00 |
| 1981 | 5.00 | 5.00 |
| 1982 | 3.00 | 3.00 |
| 1983 | 2.00 | 2.00 |
| 1984 | 2.00 | 2.00 |
| 1985 | 2.00 | 2.00 |
| 1986 | 1.40 | 1.40 |
| 1987 | 2.10 | 2.10 |
| 1988 | 1.40 | 1.40 |
| 1989 | 1.40 | 1.40 |
| 1990 | 1.10 | 1.10 |
| 1991 | 1.10 | 1.10 |
| 1992 | .80 | .80 |
| 1993 | 1.10 | 1.10 |
| 1994 | 1.10 | 1.10 |
| 1995 | .70 | .70 |
| 1996 | .70 | .70 |
| 1997 | .70 | .70 |
| 1998 | .70 | .70 |
| 1999 | .40 | .40 |
| 2000 | .40 | .40 |
| 2001 | .40 | .40 |
| 2002 | .40 | .40 |
| 2003 | .70 | .70 |
| 2004 | 28.00 | 28.00 |
| 2005 | 26.00 | 26.00 |
| 2006 | 34.00 | 34.00 |
| 2007 | 40.00 | 40.00 |
| 2008 | 51.00 | 51.00 |
| 2009 | 42.00 | 102.00 |
| 2010 | 55.00 | 129.00 |
| 2011 | 92.00 | 117.00 |
| 2012 | 48.00 | 52.00 |
| 2013 | 161.00 | 180.00 |
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