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year | consumption | change |
1986 | 7.10 | NA |
1987 | 7.60 | 7.04% |
1988 | 7.60 | 0.00% |
1989 | 8.70 | 14.47% |
1990 | 9.50 | 9.20% |
1991 | 11.00 | 15.79% |
1992 | 12.00 | 9.09% |
1993 | 12.00 | 0.00% |
1994 | 13.00 | 8.33% |
1995 | 12.00 | -7.69% |
1996 | 12.00 | 0.00% |
1997 | 13.00 | 8.33% |
1998 | 13.00 | 0.00% |
1999 | 13.00 | 0.00% |
2000 | 13.00 | 0.00% |
2001 | 13.00 | 0.00% |
2002 | 13.00 | 0.00% |
2003 | 13.00 | 0.00% |
2004 | 13.00 | 0.00% |
2005 | 12.00 | -7.69% |
2006 | 10.00 | -16.67% |
2007 | 10.00 | 0.00% |
2008 | 9.50 | -5.00% |
2009 | 8.70 | -8.42% |
2010 | 8.10 | -6.90% |
2011 | 8.50 | 4.94% |
2012 | 8.10 | -4.71% |
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