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Loading...
| year | production | consumption |
| 1980 | 171.00 | 91.00 |
| 1981 | 152.00 | 99.00 |
| 1982 | 173.00 | 91.00 |
| 1983 | 182.00 | 87.00 |
| 1984 | 229.00 | 83.00 |
| 1985 | 229.00 | 79.00 |
| 1986 | 293.00 | 81.00 |
| 1987 | 295.00 | 79.00 |
| 1988 | 285.00 | 77.00 |
| 1989 | 295.00 | 79.00 |
| 1990 | 313.00 | 80.00 |
| 1991 | 315.00 | 80.00 |
| 1992 | 295.00 | 83.00 |
| 1993 | 343.00 | 88.00 |
| 1994 | 333.00 | 90.00 |
| 1995 | 344.00 | 93.00 |
| 1996 | 344.00 | 94.00 |
| 1997 | 327.00 | 94.00 |
| 1998 | 345.00 | 95.00 |
| 1999 | 305.00 | 96.00 |
| 2000 | 329.00 | 93.00 |
| 2001 | 334.00 | 95.00 |
| 2002 | 365.00 | 97.00 |
| 2003 | 364.00 | 97.00 |
| 2004 | 359.00 | 96.00 |
| 2005 | 330.00 | 95.00 |
| 2006 | 319.00 | 97.00 |
| 2007 | 162.00 | 97.00 |
| 2008 | 163.00 | 100.00 |
| 2009 | 164.00 | 97.00 |
| 2010 | 173.00 | 97.00 |
| 2011 | 153.00 | 99.00 |
| 2012 | 163.00 | 96.00 |
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