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year | consumption | change |
1986 | 3.50 | NA |
1987 | 3.60 | 2.86% |
1988 | 3.60 | 0.00% |
1989 | 3.80 | 5.56% |
1990 | 3.30 | -13.16% |
1991 | 5.00 | 51.52% |
1992 | 3.20 | -36.00% |
1993 | 3.20 | 0.00% |
1994 | 3.80 | 18.75% |
1995 | 3.90 | 2.63% |
1996 | 4.40 | 12.82% |
1997 | 4.50 | 2.27% |
1998 | 4.50 | 0.00% |
1999 | 4.50 | 0.00% |
2000 | 4.80 | 6.67% |
2001 | 4.50 | -6.25% |
2002 | 4.60 | 2.22% |
2003 | 4.70 | 2.17% |
2004 | 4.70 | 0.00% |
2005 | 4.50 | -4.26% |
2006 | 4.70 | 4.44% |
2007 | 5.00 | 6.38% |
2008 | 5.10 | 2.00% |
2009 | 5.10 | 0.00% |
2010 | 5.40 | 5.88% |
2011 | 5.70 | 5.56% |
2012 | 6.10 | 7.02% |
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