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year | consumption | change |
1986 | 2.20 | NA |
1987 | 2.30 | 4.55% |
1988 | 2.20 | -4.35% |
1989 | 2.60 | 18.18% |
1990 | 2.70 | 3.85% |
1991 | 2.70 | 0.00% |
1992 | 2.80 | 3.70% |
1993 | 2.80 | 0.00% |
1994 | 2.70 | -3.57% |
1995 | 2.60 | -3.70% |
1996 | 2.60 | 0.00% |
1997 | 2.70 | 3.85% |
1998 | 2.70 | 0.00% |
1999 | 2.70 | 0.00% |
2000 | 2.50 | -7.41% |
2001 | 2.60 | 4.00% |
2002 | 2.60 | 0.00% |
2003 | 2.60 | 0.00% |
2004 | 2.60 | 0.00% |
2005 | 2.70 | 3.85% |
2006 | 2.70 | 0.00% |
2007 | 2.80 | 3.70% |
2008 | 2.10 | -25.00% |
2009 | 2.70 | 28.57% |
2010 | 2.70 | 0.00% |
2011 | 1.80 | -33.33% |
2012 | 1.80 | 0.00% |
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