|
| year | consumption | change |
| 1980 | 59,928.84 | NA |
| 1981 | 58,013.31 | -3.20 % |
| 1982 | 56,722.96 | -2.22 % |
| 1983 | 56,002.25 | -1.27 % |
| 1984 | 57,064.08 | 1.90 % |
| 1985 | 57,382.49 | 0.56 % |
| 1986 | 58,996.11 | 2.81 % |
| 1987 | 60,385.75 | 2.36 % |
| 1988 | 62,269.80 | 3.12 % |
| 1989 | 63,497.39 | 1.97 % |
| 1990 | 63,875.13 | 0.59 % |
| 1991 | 66,970.88 | 4.85 % |
| 1992 | 67,136.27 | 0.25 % |
| 1993 | 67,587.53 | 0.67 % |
| 1994 | 68,927.09 | 1.98 % |
| 1995 | 70,130.20 | 1.75 % |
| 1996 | 71,712.41 | 2.26 % |
| 1997 | 73,459.28 | 2.44 % |
| 1998 | 74,109.43 | 0.89 % |
| 1999 | 75,872.74 | 2.38 % |
| 2000 | 76,779.14 | 1.19 % |
| 2001 | 77,468.54 | 0.90 % |
| 2002 | 78,163.60 | 0.90 % |
| 2003 | 79,708.27 | 1.98 % |
| 2004 | 82,564.87 | 3.58 % |
| 2005 | 84,067.14 | 1.82 % |
| 2006 | 85,132.05 | 1.27 % |
| 2007 | 85,901.96 | 0.90 % |
| 2008 | 84,463.22 | -1.67 % |
| 2009 | 84,756.56 | 0.35 % |
| 2010 | 87,371.34 | 3.09 % |
| 2011 | 87,356.29 | -0.02 % |
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