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year | consumption | change |
1980 | .88 | NA |
1981 | .90 | 2.27% |
1982 | .96 | 6.67% |
1983 | 1.00 | 4.17% |
1984 | 1.03 | 3.00% |
1985 | 1.04 | 0.97% |
1986 | 1.09 | 4.81% |
1987 | 1.11 | 1.83% |
1988 | 1.21 | 9.01% |
1989 | 1.18 | -2.48% |
1990 | 1.10 | -6.78% |
1991 | .96 | -12.73% |
1992 | 1.02 | 6.25% |
1993 | .68 | -33.33% |
1994 | .68 | 0.00% |
1995 | .52 | -23.53% |
1996 | .70 | 34.62% |
1997 | .72 | 2.86% |
1998 | .73 | 1.39% |
1999 | .68 | -6.85% |
2000 | .70 | 2.94% |
2001 | .73 | 4.29% |
2002 | .75 | 2.74% |
2003 | .76 | 1.33% |
2004 | .61 | -19.74% |
2005 | .56 | -8.20% |
2006 | .43 | -23.21% |
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