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year | consumption | change |
1980 | .27 | NA |
1981 | .44 | 63.30% |
1982 | .41 | -5.05% |
1983 | .51 | 23.43% |
1984 | .58 | 13.89% |
1985 | .80 | 36.94% |
1986 | .91 | 13.80% |
1987 | 1.07 | 18.08% |
1988 | 1.17 | 9.52% |
1989 | 1.27 | 8.18% |
1990 | 1.23 | -3.15% |
1991 | 1.49 | 21.40% |
1992 | 1.61 | 8.18% |
1993 | 1.51 | -6.44% |
1994 | 1.49 | -1.19% |
1995 | 1.61 | 7.71% |
1996 | 1.67 | 3.86% |
1997 | 1.77 | 6.11% |
1998 | 1.84 | 3.78% |
1999 | 1.87 | 1.47% |
2000 | 1.87 | 0.05% |
2001 | 1.89 | 1.39% |
2002 | 2.06 | 8.88% |
2003 | 2.11 | 2.38% |
2004 | 2.22 | 5.45% |
2005 | 2.59 | 16.28% |
2006 | 2.73 | 5.57% |
2007 | 3.06 | 12.09% |
2008 | 3.45 | 12.84% |
2009 | 3.44 | -0.32% |
2010 | 3.58 | 3.95% |
2011 | 3.75 | 4.72% |
2012 | 3.92 | 4.62% |
2013 | 4.00 | 2.14% |
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