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year | consumption | change |
1992 | 5.30 | NA |
1993 | 5.40 | 1.89% |
1994 | 6.60 | 22.22% |
1995 | 5.70 | -13.64% |
1996 | 6.50 | 14.04% |
1997 | 7.10 | 9.23% |
1998 | 6.80 | -4.23% |
1999 | 6.50 | -4.41% |
2000 | 6.50 | 0.00% |
2001 | 7.80 | 20.00% |
2002 | 7.20 | -7.69% |
2003 | 7.10 | -1.39% |
2004 | 6.60 | -7.04% |
2005 | 6.70 | 1.52% |
2006 | 7.10 | 5.97% |
2007 | 7.50 | 5.63% |
2008 | 7.40 | -1.33% |
2009 | 6.80 | -8.11% |
2010 | 6.40 | -5.88% |
2011 | 6.00 | -6.25% |
2012 | 5.80 | -3.33% |
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