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Loading...
| year | production | consumption |
| 1980 | .00 | .00 |
| 1981 | .00 | .00 |
| 1982 | .00 | .00 |
| 1983 | 1.50 | 2.20 |
| 1984 | 11.00 | 6.90 |
| 1985 | 43.00 | 27.00 |
| 1986 | 72.00 | 45.00 |
| 1987 | 92.00 | 58.00 |
| 1988 | 93.00 | 64.00 |
| 1989 | 109.00 | 69.00 |
| 1990 | 111.00 | 73.00 |
| 1991 | 139.00 | 82.00 |
| 1992 | 145.00 | 87.00 |
| 1993 | 159.00 | 98.00 |
| 1994 | 172.00 | 108.00 |
| 1995 | 187.00 | 127.00 |
| 1996 | 227.00 | 148.00 |
| 1997 | 273.00 | 168.00 |
| 1998 | 268.00 | 172.00 |
| 1999 | 274.00 | 179.00 |
| 2000 | 289.00 | 182.00 |
| 2001 | 296.00 | 181.00 |
| 2002 | 296.00 | 180.00 |
| 2003 | 281.00 | 183.00 |
| 2004 | 333.00 | 183.00 |
| 2005 | 369.00 | 176.00 |
| 2006 | 368.00 | 180.00 |
| 2007 | 326.00 | 161.00 |
| 2008 | 356.00 | 162.00 |
| 2009 | 297.00 | 156.00 |
| 2010 | 290.00 | 176.00 |
| 2011 | 233.00 | 148.00 |
| 2012 | 203.00 | 139.00 |
| 2013 | 171.00 | 133.00 |
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