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year | consumption | change |
1980 | 2.00 | NA |
1981 | 1.90 | -5.00% |
1982 | 1.90 | 0.00% |
1983 | 1.90 | 0.00% |
1984 | .90 | -52.63% |
1985 | 1.10 | 22.22% |
1986 | 1.90 | 72.73% |
1987 | 1.70 | -10.53% |
1988 | 1.10 | -35.29% |
1989 | 1.10 | 0.00% |
1990 | 2.40 | 118.18% |
1991 | 2.20 | -8.33% |
1992 | 2.20 | 0.00% |
1993 | 1.10 | -50.00% |
1994 | 1.20 | 9.09% |
1995 | 1.20 | 0.00% |
1996 | 1.20 | 0.00% |
1997 | 1.20 | 0.00% |
1998 | 1.20 | 0.00% |
1999 | 1.20 | 0.00% |
2000 | 1.30 | 8.33% |
2001 | 1.40 | 7.69% |
2002 | 1.40 | 0.00% |
2003 | 1.40 | 0.00% |
2004 | 1.30 | -7.14% |
2005 | 1.50 | 15.38% |
2006 | 1.60 | 6.67% |
2007 | 1.80 | 12.50% |
2008 | 1.80 | 0.00% |
2009 | 1.80 | 0.00% |
2010 | 1.80 | 0.00% |
2011 | 1.80 | 0.00% |
2012 | 1.80 | 0.00% |
2013 | 1.70 | -5.56% |
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