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year | consumption | change |
1980 | .76 | NA |
1981 | .73 | -3.04% |
1982 | .72 | -1.77% |
1983 | .74 | 2.64% |
1984 | .77 | 3.92% |
1985 | .81 | 5.20% |
1986 | .84 | 3.34% |
1987 | .90 | 7.42% |
1988 | .96 | 6.57% |
1989 | 1.00 | 4.60% |
1990 | 1.04 | 3.70% |
1991 | 1.06 | 1.73% |
1992 | 1.02 | -3.41% |
1993 | 1.07 | 5.20% |
1994 | 1.09 | 1.30% |
1995 | 1.12 | 3.40% |
1996 | 1.15 | 1.87% |
1997 | 1.20 | 4.72% |
1998 | 1.27 | 6.26% |
1999 | 1.27 | -0.63% |
2000 | 1.34 | 5.69% |
2001 | 1.36 | 1.27% |
2002 | 1.36 | 0.37% |
2003 | 1.44 | 5.66% |
2004 | 1.43 | -0.70% |
2005 | 1.44 | 0.56% |
2006 | 1.48 | 3.07% |
2007 | 1.50 | 1.42% |
2008 | 1.47 | -1.93% |
2009 | 1.40 | -4.62% |
2010 | 1.35 | -3.92% |
2011 | 1.30 | -3.26% |
2012 | 1.21 | -6.98% |
2013 | 1.15 | -5.11% |
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