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Loading...
| year | production | consumption |
| 1980 | 22.00 | 22.00 |
| 1981 | 33.00 | 33.00 |
| 1982 | 50.00 | 50.00 |
| 1983 | 143.00 | 143.00 |
| 1984 | 165.00 | 165.00 |
| 1985 | 166.00 | 166.00 |
| 1986 | 137.00 | 137.00 |
| 1987 | 181.00 | 181.00 |
| 1988 | 171.00 | 171.00 |
| 1989 | 188.00 | 188.00 |
| 1990 | 190.00 | 190.00 |
| 1991 | 190.00 | 190.00 |
| 1992 | 187.00 | 187.00 |
| 1993 | 190.00 | 190.00 |
| 1994 | 190.00 | 190.00 |
| 1995 | 191.00 | 191.00 |
| 1996 | 191.00 | 191.00 |
| 1997 | 192.00 | 192.00 |
| 1998 | 192.00 | 192.00 |
| 1999 | 193.00 | 193.00 |
| 2000 | 174.00 | 174.00 |
| 2001 | 180.00 | 180.00 |
| 2002 | 202.00 | 202.00 |
| 2003 | 208.00 | 208.00 |
| 2004 | 261.00 | 256.00 |
| 2005 | 201.00 | 207.00 |
| 2006 | 194.00 | 187.00 |
| 2007 | 189.00 | 201.00 |
| 2008 | 202.00 | 198.00 |
| 2009 | 248.00 | 209.00 |
| 2010 | 272.00 | 262.00 |
| 2011 | 271.00 | 262.00 |
| 2012 | 259.00 | 262.00 |
| 2013 | 263.00 | 263.00 |
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