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Loading...
| year | production | consumption |
| 1980 | 292.00 | 270.00 |
| 1981 | 237.00 | 232.00 |
| 1982 | 182.00 | 212.00 |
| 1983 | 227.00 | 156.00 |
| 1984 | 272.00 | 124.00 |
| 1985 | 228.00 | 138.00 |
| 1986 | 249.00 | 161.00 |
| 1987 | 244.00 | 162.00 |
| 1988 | 253.00 | 183.00 |
| 1989 | 249.00 | 176.00 |
| 1990 | 236.00 | 182.00 |
| 1991 | 256.00 | 188.00 |
| 1992 | 259.00 | 187.00 |
| 1993 | 263.00 | 199.00 |
| 1994 | 224.00 | 188.00 |
| 1995 | 228.00 | 183.00 |
| 1996 | 235.00 | 190.00 |
| 1997 | 234.00 | 193.00 |
| 1998 | 255.00 | 192.00 |
| 1999 | 197.00 | 200.00 |
| 2000 | 198.00 | 209.00 |
| 2001 | 191.00 | 232.00 |
| 2002 | 225.00 | 229.00 |
| 2003 | 219.00 | 216.00 |
| 2004 | 230.00 | 237.00 |
| 2005 | 219.00 | 275.00 |
| 2006 | 215.00 | 287.00 |
| 2007 | 168.00 | 269.00 |
| 2008 | 152.00 | 258.00 |
| 2009 | 150.00 | 237.00 |
| 2010 | 173.00 | 228.00 |
| 2011 | 150.00 | 244.00 |
| 2012 | 153.00 | 219.00 |
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