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year | consumption | change |
1986 | 9.20 | NA |
1987 | 8.30 | -9.78% |
1988 | 8.30 | 0.00% |
1989 | 8.60 | 3.61% |
1990 | 9.20 | 6.98% |
1991 | 10.00 | 8.70% |
1992 | 13.00 | 30.00% |
1993 | 14.00 | 7.69% |
1994 | 15.00 | 7.14% |
1995 | 15.00 | 0.00% |
1996 | 16.00 | 6.67% |
1997 | 17.00 | 6.25% |
1998 | 18.00 | 5.88% |
1999 | 18.00 | 0.00% |
2000 | 14.00 | -22.22% |
2001 | 13.00 | -7.14% |
2002 | 13.00 | 0.00% |
2003 | 13.00 | 0.00% |
2004 | 14.00 | 7.69% |
2005 | 13.00 | -7.14% |
2006 | 13.00 | 0.00% |
2007 | 13.00 | 0.00% |
2008 | 13.00 | 0.00% |
2009 | 10.00 | -23.08% |
2010 | 8.80 | -12.00% |
2011 | 9.10 | 3.41% |
2012 | 9.00 | -1.10% |
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