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Loading...
| year | production | consumption |
| 1980 | 43.00 | 43.00 |
| 1981 | 53.00 | 53.00 |
| 1982 | 47.00 | 32.00 |
| 1983 | 47.00 | 47.00 |
| 1984 | 52.00 | 52.00 |
| 1985 | 50.00 | 50.00 |
| 1986 | 40.00 | 40.00 |
| 1987 | 43.00 | 43.00 |
| 1988 | 24.00 | 24.00 |
| 1989 | 50.00 | 50.00 |
| 1990 | 80.00 | 80.00 |
| 1991 | 34.00 | 116.00 |
| 1992 | 31.00 | 110.00 |
| 1993 | 29.00 | 111.00 |
| 1994 | 32.00 | 141.00 |
| 1995 | 34.00 | 151.00 |
| 1996 | 32.00 | 157.00 |
| 1997 | 33.00 | 187.00 |
| 1998 | 31.00 | 219.00 |
| 1999 | 31.00 | 220.00 |
| 2000 | 31.00 | 243.00 |
| 2001 | 30.00 | 242.00 |
| 2002 | 33.00 | 287.00 |
| 2003 | 29.00 | 293.00 |
| 2004 | 30.00 | 352.00 |
| 2005 | 28.00 | 368.00 |
| 2006 | 15.00 | 375.00 |
| 2007 | 13.00 | 402.00 |
| 2008 | 11.00 | 412.00 |
| 2009 | 11.00 | 427.00 |
| 2010 | 9.20 | 535.00 |
| 2011 | 10.00 | 572.00 |
| 2012 | 14.00 | 538.00 |
| 2013 | 12.00 | 551.00 |
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