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year | consumption | change |
1986 | 4.10 | NA |
1987 | 3.00 | -26.83 % |
1988 | 3.80 | 26.67 % |
1989 | 4.40 | 15.79 % |
1990 | 4.10 | -6.82 % |
1991 | 4.90 | 19.51 % |
1992 | 5.00 | 2.04 % |
1993 | 5.10 | 2.00 % |
1994 | 5.30 | 3.92 % |
1995 | 4.50 | -15.09 % |
1996 | 4.60 | 2.22 % |
1997 | 5.50 | 19.57 % |
1998 | 5.20 | -5.45 % |
1999 | 3.60 | -30.77 % |
2000 | 3.70 | 2.78 % |
2001 | 2.60 | -29.73 % |
2002 | 2.40 | -7.69 % |
2003 | 2.40 | 0.00 % |
2004 | 2.40 | 0.00 % |
2005 | 2.60 | 8.33 % |
2006 | 2.40 | -7.69 % |
2007 | 3.80 | 58.33 % |
2008 | 4.50 | 18.42 % |
2009 | 4.60 | 2.22 % |
2010 | 5.30 | 15.22 % |
2011 | 5.90 | 11.32 % |
2012 | 6.00 | 1.69 % |
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