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Loading...
| year | production | consumption |
| 1980 | 397.00 | 394.00 |
| 1981 | 391.00 | 342.00 |
| 1982 | 344.00 | 360.00 |
| 1983 | 303.00 | 315.00 |
| 1984 | 302.00 | 212.00 |
| 1985 | 269.00 | 187.00 |
| 1986 | 285.00 | 192.00 |
| 1987 | 262.00 | 185.00 |
| 1988 | 247.00 | 194.00 |
| 1989 | 275.00 | 192.00 |
| 1990 | 282.00 | 191.00 |
| 1991 | 284.00 | 204.00 |
| 1992 | 297.00 | 220.00 |
| 1993 | 262.00 | 201.00 |
| 1994 | 252.00 | 211.00 |
| 1995 | 244.00 | 232.00 |
| 1996 | 221.00 | 206.00 |
| 1997 | 241.00 | 213.00 |
| 1998 | 266.00 | 238.00 |
| 1999 | 250.00 | 255.00 |
| 2000 | 231.00 | 247.00 |
| 2001 | 208.00 | 257.00 |
| 2002 | 214.00 | 275.00 |
| 2003 | 179.00 | 253.00 |
| 2004 | 161.00 | 238.00 |
| 2005 | 159.00 | 247.00 |
| 2006 | 163.00 | 224.00 |
| 2007 | 165.00 | 215.00 |
| 2008 | 170.00 | 214.00 |
| 2009 | 162.00 | 204.00 |
| 2010 | 147.00 | 189.00 |
| 2011 | 140.00 | 189.00 |
| 2012 | 115.00 | 183.00 |
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