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Loading...
| year | production | consumption |
| 1980 | 40.00 | 40.00 |
| 1981 | 49.00 | 49.00 |
| 1982 | 46.00 | 46.00 |
| 1983 | 46.00 | 46.00 |
| 1984 | 46.00 | 46.00 |
| 1985 | 47.00 | 47.00 |
| 1986 | 49.00 | 49.00 |
| 1987 | 47.00 | 47.00 |
| 1988 | 44.00 | 44.00 |
| 1989 | 41.00 | 41.00 |
| 1990 | 19.00 | 19.00 |
| 1991 | 18.00 | 18.00 |
| 1992 | 18.00 | 18.00 |
| 1993 | 34.00 | 34.00 |
| 1994 | 35.00 | 35.00 |
| 1995 | 33.00 | 33.00 |
| 1996 | 34.00 | 34.00 |
| 1997 | 8.50 | 8.50 |
| 1998 | 14.00 | 14.00 |
| 1999 | 14.00 | 14.00 |
| 2000 | 12.00 | 12.00 |
| 2001 | 13.00 | 13.00 |
| 2002 | 16.00 | 16.00 |
| 2003 | 18.00 | 18.00 |
| 2004 | 30.00 | 30.00 |
| 2005 | 56.00 | 56.00 |
| 2006 | 63.00 | 63.00 |
| 2007 | 94.00 | 94.00 |
| 2008 | 129.00 | 129.00 |
| 2009 | 123.00 | 123.00 |
| 2010 | 255.00 | 194.00 |
| 2011 | 401.00 | 202.00 |
| 2012 | 418.00 | 233.00 |
| 2013 | 431.00 | 208.00 |
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