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Loading...
| year | production | consumption |
| 1980 | .00 | .00 |
| 1981 | .00 | .00 |
| 1982 | .00 | .00 |
| 1983 | .00 | .00 |
| 1984 | .00 | .00 |
| 1985 | .00 | .00 |
| 1986 | .00 | .00 |
| 1987 | .00 | .00 |
| 1988 | .00 | .00 |
| 1989 | .00 | .00 |
| 1990 | .00 | .00 |
| 1991 | .00 | .00 |
| 1992 | 48.00 | 43.00 |
| 1993 | 47.00 | 42.00 |
| 1994 | 45.00 | 41.00 |
| 1995 | 45.00 | 39.00 |
| 1996 | 43.00 | 40.00 |
| 1997 | 44.00 | 40.00 |
| 1998 | 43.00 | 40.00 |
| 1999 | 43.00 | 40.00 |
| 2000 | 44.00 | 41.00 |
| 2001 | 45.00 | 41.00 |
| 2002 | 47.00 | 42.00 |
| 2003 | 47.00 | 42.00 |
| 2004 | 47.00 | 43.00 |
| 2005 | 47.00 | 42.00 |
| 2006 | 48.00 | 44.00 |
| 2007 | 46.00 | 42.00 |
| 2008 | 47.00 | 43.00 |
| 2009 | 47.00 | 43.00 |
| 2010 | 49.00 | 45.00 |
| 2011 | 50.00 | 45.00 |
| 2012 | 50.00 | 45.00 |
| 2013 | 52.00 | 47.00 |
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