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year | consumption | change |
1980 | .94 | NA |
1981 | .88 | -6.30% |
1982 | .87 | -0.34% |
1983 | .88 | 0.11% |
1984 | .92 | 4.80% |
1985 | .93 | 1.31% |
1986 | .96 | 3.44% |
1987 | 1.04 | 8.12% |
1988 | 1.04 | 0.29% |
1989 | 1.05 | 0.86% |
1990 | 1.10 | 4.38% |
1991 | 1.12 | 1.64% |
1992 | 1.12 | 0.27% |
1993 | 1.13 | 1.07% |
1994 | 1.18 | 4.07% |
1995 | 1.12 | -4.51% |
1996 | 1.13 | 0.98% |
1997 | 1.17 | 2.91% |
1998 | 1.21 | 4.03% |
1999 | 1.20 | -1.40% |
2000 | 1.23 | 2.51% |
2001 | 1.24 | 1.22% |
2002 | 1.25 | 0.24% |
2003 | 1.30 | 4.50% |
2004 | 1.34 | 2.69% |
2005 | 1.26 | -6.06% |
2006 | 1.31 | 4.14% |
2007 | 1.33 | 1.45% |
2008 | 1.29 | -3.02% |
2009 | 1.20 | -7.08% |
2010 | 1.29 | 7.53% |
2011 | 1.22 | -4.98% |
2012 | 1.21 | -1.15% |
2013 | 1.20 | -0.25% |
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