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year | consumption | change |
1986 | 2.70 | NA |
1987 | 2.70 | 0.00% |
1988 | 2.50 | -7.41% |
1989 | 2.80 | 12.00% |
1990 | 2.90 | 3.57% |
1991 | 2.90 | 0.00% |
1992 | 3.40 | 17.24% |
1993 | 3.50 | 2.94% |
1994 | 2.70 | -22.86% |
1995 | 2.80 | 3.70% |
1996 | .50 | -82.14% |
1997 | 2.20 | 340.00% |
1998 | 2.70 | 22.73% |
1999 | 2.70 | 0.00% |
2000 | 2.70 | 0.00% |
2001 | 3.10 | 14.81% |
2002 | 3.10 | 0.00% |
2003 | 3.10 | 0.00% |
2004 | 3.00 | -3.23% |
2005 | 3.00 | 0.00% |
2006 | 3.30 | 10.00% |
2007 | 3.10 | -6.06% |
2008 | 3.30 | 6.45% |
2009 | 4.30 | 30.30% |
2010 | 3.80 | -11.63% |
2011 | 4.30 | 13.16% |
2012 | 4.30 | 0.00% |
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