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year | consumption | change |
1986 | 2.90 | NA |
1987 | 2.70 | -6.90% |
1988 | 2.60 | -3.70% |
1989 | 3.20 | 23.08% |
1990 | 3.10 | -3.13% |
1991 | 3.20 | 3.23% |
1992 | 3.60 | 12.50% |
1993 | 4.40 | 22.22% |
1994 | 5.10 | 15.91% |
1995 | 4.70 | -7.84% |
1996 | 5.90 | 25.53% |
1997 | 5.90 | 0.00% |
1998 | 6.70 | 13.56% |
1999 | 7.10 | 5.97% |
2000 | 7.10 | 0.00% |
2001 | 7.60 | 7.04% |
2002 | 7.60 | 0.00% |
2003 | 7.50 | -1.32% |
2004 | 7.00 | -6.67% |
2005 | 7.10 | 1.43% |
2006 | 7.90 | 11.27% |
2007 | 9.50 | 20.25% |
2008 | 9.40 | -1.05% |
2009 | 11.00 | 17.02% |
2010 | 11.00 | 0.00% |
2011 | 12.00 | 9.09% |
2012 | 12.00 | 0.00% |
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