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year | consumption | change |
1980 | .52 | NA |
1981 | .48 | -7.82% |
1982 | .46 | -4.35% |
1983 | .55 | 19.26% |
1984 | .54 | -2.36% |
1985 | .57 | 5.39% |
1986 | .62 | 9.88% |
1987 | .64 | 2.57% |
1988 | .77 | 20.03% |
1989 | .83 | 7.56% |
1990 | .92 | 11.27% |
1991 | .62 | -32.03% |
1992 | .84 | 34.46% |
1993 | .96 | 14.90% |
1994 | 1.10 | 14.32% |
1995 | 1.13 | 2.63% |
1996 | 1.13 | -0.53% |
1997 | 1.04 | -7.47% |
1998 | 1.06 | 1.44% |
1999 | 1.07 | 1.70% |
2000 | 1.08 | 0.93% |
2001 | 1.13 | 4.61% |
2002 | 1.14 | 0.88% |
2003 | 1.01 | -11.54% |
2004 | 1.13 | 11.17% |
2005 | 1.24 | 10.13% |
2006 | 1.23 | -1.05% |
2007 | 1.30 | 6.28% |
2008 | 1.34 | 2.61% |
2009 | 1.38 | 3.14% |
2010 | 1.44 | 4.28% |
2011 | 1.47 | 2.09% |
2012 | 1.62 | 10.29% |
2013 | 1.71 | 5.56% |
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