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Loading...
| year | production | consumption |
| 1980 | .00 | 154.00 |
| 1981 | .00 | 140.00 |
| 1982 | .00 | 184.00 |
| 1983 | .00 | 185.00 |
| 1984 | .00 | 191.00 |
| 1985 | .00 | 180.00 |
| 1986 | .00 | 196.00 |
| 1987 | .00 | 192.00 |
| 1988 | .00 | 204.00 |
| 1989 | .00 | 249.00 |
| 1990 | .00 | 251.00 |
| 1991 | .00 | 252.00 |
| 1992 | .00 | 279.00 |
| 1993 | .00 | 266.00 |
| 1994 | .00 | 271.00 |
| 1995 | .00 | 290.00 |
| 1996 | .00 | 281.00 |
| 1997 | .00 | 298.00 |
| 1998 | .00 | 326.00 |
| 1999 | .00 | 337.00 |
| 2000 | .00 | 333.00 |
| 2001 | .00 | 334.00 |
| 2002 | .00 | 343.00 |
| 2003 | .00 | 326.00 |
| 2004 | .00 | 328.00 |
| 2005 | .00 | 337.00 |
| 2006 | .00 | 303.00 |
| 2007 | .00 | 308.00 |
| 2008 | .00 | 293.00 |
| 2009 | .00 | 276.00 |
| 2010 | .00 | 274.00 |
| 2011 | .00 | 256.00 |
| 2012 | .00 | 230.00 |
| 2013 | .00 | 238.00 |
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