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Loading...
| year | production | consumption |
| 1980 | 87.00 | 78.00 |
| 1981 | 93.00 | 82.00 |
| 1982 | 97.00 | 88.00 |
| 1983 | 98.00 | 90.00 |
| 1984 | 104.00 | 96.00 |
| 1985 | 110.00 | 100.00 |
| 1986 | 116.00 | 107.00 |
| 1987 | 122.00 | 112.00 |
| 1988 | 131.00 | 121.00 |
| 1989 | 139.00 | 128.00 |
| 1990 | 146.00 | 135.00 |
| 1991 | 148.00 | 138.00 |
| 1992 | 151.00 | 140.00 |
| 1993 | 155.00 | 144.00 |
| 1994 | 158.00 | 148.00 |
| 1995 | 164.00 | 152.00 |
| 1996 | 168.00 | 157.00 |
| 1997 | 173.00 | 162.00 |
| 1998 | 185.00 | 172.00 |
| 1999 | 192.00 | 176.00 |
| 2000 | 198.00 | 183.00 |
| 2001 | 212.00 | 193.00 |
| 2002 | 215.00 | 200.00 |
| 2003 | 214.00 | 201.00 |
| 2004 | 223.00 | 205.00 |
| 2005 | 215.00 | 200.00 |
| 2006 | 220.00 | 204.00 |
| 2007 | 229.00 | 215.00 |
| 2008 | 229.00 | 215.00 |
| 2009 | 235.00 | 220.00 |
| 2010 | 238.00 | 222.00 |
| 2011 | 239.00 | 225.00 |
| 2012 | 236.00 | 224.00 |
| 2013 | 238.00 | 223.00 |
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