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year | consumption | change |
1986 | 1.90 | NA |
1987 | 3.30 | 73.68% |
1988 | 3.60 | 9.09% |
1989 | 3.90 | 8.33% |
1990 | 1.60 | -58.97% |
1991 | 1.60 | 0.00% |
1992 | 2.50 | 56.25% |
1993 | 2.30 | -8.00% |
1994 | 2.00 | -13.04% |
1995 | 3.40 | 70.00% |
1996 | 4.00 | 17.65% |
1997 | 4.30 | 7.50% |
1998 | 4.50 | 4.65% |
1999 | 4.90 | 8.89% |
2000 | 5.00 | 2.04% |
2001 | 5.50 | 10.00% |
2002 | 5.90 | 7.27% |
2003 | 6.20 | 5.08% |
2004 | 6.40 | 3.23% |
2005 | 6.40 | 0.00% |
2006 | 6.50 | 1.56% |
2007 | 6.50 | 0.00% |
2008 | 8.50 | 30.77% |
2009 | 7.80 | -8.24% |
2010 | 9.20 | 17.95% |
2011 | 7.80 | -15.22% |
2012 | 9.10 | 16.67% |
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