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Loading...
| year | production | consumption |
| 1980 | 615.00 | 551.00 |
| 1981 | 531.00 | 383.00 |
| 1982 | 404.00 | 378.00 |
| 1983 | 349.00 | 342.00 |
| 1984 | 275.00 | 227.00 |
| 1985 | 259.00 | 198.00 |
| 1986 | 250.00 | 175.00 |
| 1987 | 228.00 | 175.00 |
| 1988 | 220.00 | 164.00 |
| 1989 | 220.00 | 182.00 |
| 1990 | 219.00 | 175.00 |
| 1991 | 220.00 | 196.00 |
| 1992 | 220.00 | 165.00 |
| 1993 | 223.00 | 150.00 |
| 1994 | 188.00 | 137.00 |
| 1995 | 188.00 | 146.00 |
| 1996 | 183.00 | 148.00 |
| 1997 | 192.00 | 145.00 |
| 1998 | 223.00 | 162.00 |
| 1999 | 174.00 | 150.00 |
| 2000 | 179.00 | 137.00 |
| 2001 | 191.00 | 124.00 |
| 2002 | 182.00 | 113.00 |
| 2003 | 194.00 | 115.00 |
| 2004 | 209.00 | 117.00 |
| 2005 | 209.00 | 118.00 |
| 2006 | 210.00 | 119.00 |
| 2007 | 202.00 | 113.00 |
| 2008 | 201.00 | 103.00 |
| 2009 | 168.00 | 98.00 |
| 2010 | 163.00 | 92.00 |
| 2011 | 159.00 | 82.00 |
| 2012 | 145.00 | 74.00 |
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