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year | consumption | change |
1980 | .11 | NA |
1981 | .10 | -4.59% |
1982 | .10 | -5.77% |
1983 | .12 | 22.45% |
1984 | .12 | -2.50% |
1985 | .11 | -7.69% |
1986 | .11 | 5.56% |
1987 | .12 | 7.02% |
1988 | .12 | -2.46% |
1989 | .11 | -11.76% |
1990 | .13 | 27.62% |
1991 | .12 | -10.45% |
1992 | .14 | 14.17% |
1993 | .14 | 2.19% |
1994 | .14 | -1.43% |
1995 | .13 | -9.42% |
1996 | .13 | 3.20% |
1997 | .14 | 10.08% |
1998 | .18 | 25.35% |
1999 | .16 | -10.11% |
2000 | .16 | 2.50% |
2001 | .16 | -1.22% |
2002 | .17 | 3.70% |
2003 | .16 | -3.57% |
2004 | .14 | -12.96% |
2005 | .16 | 11.35% |
2006 | .15 | -5.10% |
2007 | .18 | 19.46% |
2008 | .18 | 3.37% |
2009 | .19 | 3.26% |
2010 | .21 | 9.47% |
2011 | .20 | -2.40% |
2012 | .20 | 0.49% |
2013 | .19 | -6.86% |
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