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Loading...
| year | production | consumption |
| 1980 | 265.00 | 243.00 |
| 1981 | 259.00 | 239.00 |
| 1982 | 254.00 | 233.00 |
| 1983 | 257.00 | 236.00 |
| 1984 | 262.00 | 239.00 |
| 1985 | 275.00 | 250.00 |
| 1986 | 279.00 | 258.00 |
| 1987 | 283.00 | 268.00 |
| 1988 | 288.00 | 277.00 |
| 1989 | 295.00 | 282.00 |
| 1990 | 298.00 | 284.00 |
| 1991 | 301.00 | 292.00 |
| 1992 | 300.00 | 293.00 |
| 1993 | 300.00 | 294.00 |
| 1994 | 302.00 | 287.00 |
| 1995 | 308.00 | 297.00 |
| 1996 | 328.00 | 316.00 |
| 1997 | 327.00 | 316.00 |
| 1998 | 340.00 | 323.00 |
| 1999 | 344.00 | 328.00 |
| 2000 | 353.00 | 336.00 |
| 2001 | 360.00 | 339.00 |
| 2002 | 362.00 | 340.00 |
| 2003 | 373.00 | 343.00 |
| 2004 | 369.00 | 343.00 |
| 2005 | 371.00 | 351.00 |
| 2006 | 368.00 | 348.00 |
| 2007 | 368.00 | 345.00 |
| 2008 | 359.00 | 342.00 |
| 2009 | 347.00 | 322.00 |
| 2010 | 353.00 | 330.00 |
| 2011 | 340.00 | 319.00 |
| 2012 | 336.00 | 320.00 |
| 2013 | 332.00 | 319.00 |
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