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Loading...
| year | production | consumption |
| 1980 | 245.00 | 245.00 |
| 1981 | 270.00 | 264.00 |
| 1982 | 235.00 | 227.00 |
| 1983 | 224.00 | 200.00 |
| 1984 | 245.00 | 230.00 |
| 1985 | 246.00 | 242.00 |
| 1986 | 243.00 | 232.00 |
| 1987 | 232.00 | 233.00 |
| 1988 | 206.00 | 213.00 |
| 1989 | 234.00 | 227.00 |
| 1990 | 259.00 | 234.00 |
| 1991 | 276.00 | 259.00 |
| 1992 | 278.00 | 269.00 |
| 1993 | 273.00 | 257.00 |
| 1994 | 290.00 | 293.00 |
| 1995 | 260.00 | 270.00 |
| 1996 | 275.00 | 288.00 |
| 1997 | 280.00 | 310.00 |
| 1998 | 290.00 | 335.00 |
| 1999 | 273.00 | 321.00 |
| 2000 | 266.00 | 329.00 |
| 2001 | 282.00 | 319.00 |
| 2002 | 271.00 | 306.00 |
| 2003 | 306.00 | 334.00 |
| 2004 | 325.00 | 342.00 |
| 2005 | 319.00 | 361.00 |
| 2006 | 329.00 | 387.00 |
| 2007 | 337.00 | 404.00 |
| 2008 | 354.00 | 428.00 |
| 2009 | 387.00 | 407.00 |
| 2010 | 360.00 | 423.00 |
| 2011 | 361.00 | 436.00 |
| 2012 | 382.00 | 431.00 |
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