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year | consumption | change |
1980 | 1.58 | NA |
1981 | 1.72 | 8.67% |
1982 | 1.74 | 1.51% |
1983 | 1.68 | -3.73% |
1984 | 1.71 | 1.79% |
1985 | 1.74 | 1.58% |
1986 | 1.88 | 8.29% |
1987 | 1.92 | 2.02% |
1988 | 1.93 | 0.63% |
1989 | 2.07 | 6.99% |
1990 | 2.10 | 1.79% |
1991 | 2.21 | 5.19% |
1992 | 2.22 | 0.32% |
1993 | 2.29 | 3.29% |
1994 | 2.44 | 6.37% |
1995 | 2.47 | 1.35% |
1996 | 2.57 | 4.13% |
1997 | 2.66 | 3.50% |
1998 | 2.86 | 7.55% |
1999 | 2.65 | -7.54% |
2000 | 2.77 | 4.65% |
2001 | 3.03 | 9.42% |
2002 | 2.94 | -3.17% |
2003 | 2.72 | -7.50% |
2004 | 2.93 | 7.92% |
2005 | 3.01 | 2.56% |
2006 | 3.25 | 7.99% |
2007 | 2.93 | -9.71% |
2008 | 3.14 | 7.17% |
2009 | 3.10 | -1.27% |
2010 | 3.01 | -2.77% |
2011 | 3.38 | 12.28% |
2012 | 3.27 | -3.46% |
2013 | 3.36 | 2.75% |
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