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Loading...
| year | production | consumption |
| 1980 | 474.00 | 423.00 |
| 1981 | 386.00 | 313.00 |
| 1982 | 340.00 | 370.00 |
| 1983 | 298.00 | 294.00 |
| 1984 | 273.00 | 553.00 |
| 1985 | 267.00 | 338.00 |
| 1986 | 259.00 | 282.00 |
| 1987 | 261.00 | 231.00 |
| 1988 | 255.00 | 260.00 |
| 1989 | 266.00 | 252.00 |
| 1990 | 280.00 | 270.00 |
| 1991 | 273.00 | 266.00 |
| 1992 | 258.00 | 243.00 |
| 1993 | 275.00 | 224.00 |
| 1994 | 244.00 | 205.00 |
| 1995 | 235.00 | 182.00 |
| 1996 | 243.00 | 173.00 |
| 1997 | 248.00 | 149.00 |
| 1998 | 238.00 | 124.00 |
| 1999 | 215.00 | 105.00 |
| 2000 | 209.00 | 81.00 |
| 2001 | 211.00 | 97.00 |
| 2002 | 186.00 | 86.00 |
| 2003 | 203.00 | 90.00 |
| 2004 | 229.00 | 95.00 |
| 2005 | 208.00 | 89.00 |
| 2006 | 217.00 | 84.00 |
| 2007 | 209.00 | 83.00 |
| 2008 | 192.00 | 92.00 |
| 2009 | 149.00 | 77.00 |
| 2010 | 132.00 | 68.00 |
| 2011 | 140.00 | 63.00 |
| 2012 | 127.00 | 45.00 |
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