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year | consumption | change |
1986 | 4.50 | NA |
1987 | 3.80 | -15.56% |
1988 | 3.30 | -13.16% |
1989 | 3.60 | 9.09% |
1990 | 3.30 | -8.33% |
1991 | 3.00 | -9.09% |
1992 | 3.60 | 20.00% |
1993 | 3.30 | -8.33% |
1994 | 2.50 | -24.24% |
1995 | 2.40 | -4.00% |
1996 | 2.40 | 0.00% |
1997 | 2.50 | 4.17% |
1998 | 2.00 | -20.00% |
1999 | 1.50 | -25.00% |
2000 | 1.90 | 26.67% |
2001 | 1.50 | -21.05% |
2002 | 2.00 | 33.33% |
2003 | 1.60 | -20.00% |
2004 | .90 | -43.75% |
2005 | .30 | -66.67% |
2006 | .30 | 0.00% |
2007 | .50 | 66.67% |
2008 | .40 | -20.00% |
2009 | .60 | 50.00% |
2010 | .30 | -50.00% |
2011 | .60 | 100.00% |
2012 | .40 | -33.33% |
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