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year | consumption | change |
1980 | .46 | NA |
1981 | .46 | 1.54% |
1982 | .50 | 8.44% |
1983 | .46 | -8.58% |
1984 | .47 | 3.49% |
1985 | .48 | 2.11% |
1986 | .50 | 3.10% |
1987 | .49 | -1.80% |
1988 | .50 | 1.63% |
1989 | .50 | 1.20% |
1990 | .50 | -0.79% |
1991 | .46 | -7.40% |
1992 | .41 | -11.88% |
1993 | .40 | -1.23% |
1994 | .41 | 1.99% |
1995 | .42 | 1.70% |
1996 | .43 | 2.39% |
1997 | .47 | 10.28% |
1998 | .45 | -4.87% |
1999 | .46 | 1.56% |
2000 | .46 | 0.66% |
2001 | .47 | 1.53% |
2002 | .47 | 0.21% |
2003 | .46 | -0.64% |
2004 | .52 | 11.85% |
2005 | .45 | -13.29% |
2006 | .36 | -21.11% |
2007 | .37 | 4.79% |
2008 | .35 | -5.91% |
2009 | .42 | 18.57% |
2010 | .40 | -3.61% |
2011 | .41 | 2.75% |
2012 | .41 | -0.49% |
2013 | .40 | -3.42% |
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