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year | consumption | change |
1986 | 6.80 | NA |
1987 | 4.00 | -41.18% |
1988 | 2.00 | -50.00% |
1989 | 1.80 | -10.00% |
1990 | 2.00 | 11.11% |
1991 | 1.80 | -10.00% |
1992 | 1.80 | 0.00% |
1993 | 2.10 | 16.67% |
1994 | 3.00 | 42.86% |
1995 | 4.20 | 40.00% |
1996 | 4.20 | 0.00% |
1997 | 2.00 | -52.38% |
1998 | 1.90 | -5.00% |
1999 | 1.80 | -5.26% |
2000 | 2.30 | 27.78% |
2001 | 1.90 | -17.39% |
2002 | 2.90 | 52.63% |
2003 | 2.50 | -13.79% |
2004 | 2.50 | 0.00% |
2005 | 2.20 | -12.00% |
2006 | 2.50 | 13.64% |
2007 | 2.20 | -12.00% |
2008 | .90 | -59.09% |
2009 | 2.80 | 211.11% |
2010 | 2.70 | -3.57% |
2011 | 2.70 | 0.00% |
2012 | 2.90 | 7.41% |
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