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year | consumption | change |
1986 | 2.00 | NA |
1987 | 1.40 | -30.00% |
1988 | 3.30 | 135.71% |
1989 | 2.90 | -12.12% |
1990 | 3.50 | 20.69% |
1991 | 3.40 | -2.86% |
1992 | 2.90 | -14.71% |
1993 | 3.00 | 3.45% |
1994 | 3.00 | 0.00% |
1995 | 3.00 | 0.00% |
1996 | 3.00 | 0.00% |
1997 | 3.10 | 3.33% |
1998 | 3.10 | 0.00% |
1999 | 3.10 | 0.00% |
2000 | 3.20 | 3.23% |
2001 | 3.20 | 0.00% |
2002 | 3.30 | 3.13% |
2003 | 3.30 | 0.00% |
2004 | 3.30 | 0.00% |
2005 | 3.40 | 3.03% |
2006 | 3.40 | 0.00% |
2007 | 3.20 | -5.88% |
2008 | 3.60 | 12.50% |
2009 | 3.50 | -2.78% |
2010 | 5.70 | 62.86% |
2011 | 6.10 | 7.02% |
2012 | 6.10 | 0.00% |
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