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year | consumption | change |
1986 | 4.20 | NA |
1987 | 4.20 | 0.00% |
1988 | 4.50 | 7.14% |
1989 | 4.70 | 4.44% |
1990 | 5.00 | 6.38% |
1991 | 5.10 | 2.00% |
1992 | 5.40 | 5.88% |
1993 | 5.40 | 0.00% |
1994 | 5.50 | 1.85% |
1995 | 5.80 | 5.45% |
1996 | 5.70 | -1.72% |
1997 | 5.20 | -8.77% |
1998 | 7.50 | 44.23% |
1999 | 7.90 | 5.33% |
2000 | 7.90 | 0.00% |
2001 | 8.80 | 11.39% |
2002 | 9.40 | 6.82% |
2003 | 9.60 | 2.13% |
2004 | 11.00 | 14.58% |
2005 | 11.00 | 0.00% |
2006 | 8.80 | -20.00% |
2007 | 12.00 | 36.36% |
2008 | 13.00 | 8.33% |
2009 | 15.00 | 15.38% |
2010 | 15.00 | 0.00% |
2011 | 14.00 | -6.67% |
2012 | 16.00 | 14.29% |
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