|
| year | consumption | change |
| 1980 | 19,218.30 | NA |
| 1981 | 19,361.19 | 0.74 % |
| 1982 | 19,727.32 | 1.89 % |
| 1983 | 21,582.26 | 9.40 % |
| 1984 | 24,087.73 | 11.61 % |
| 1985 | 27,705.19 | 15.02 % |
| 1986 | 27,948.55 | 0.88 % |
| 1987 | 28,043.85 | 0.34 % |
| 1988 | 30,170.04 | 7.58 % |
| 1989 | 30,805.50 | 2.11 % |
| 1990 | 25,825.31 | -16.17 % |
| 1991 | 30,302.81 | 17.34 % |
| 1992 | 29,715.76 | -1.94 % |
| 1993 | 30,310.33 | 2.00 % |
| 1994 | 32,068.00 | 5.80 % |
| 1995 | 32,151.27 | 0.26 % |
| 1996 | 34,436.23 | 7.11 % |
| 1997 | 36,422.95 | 5.77 % |
| 1998 | 36,568.66 | 0.40 % |
| 1999 | 35,756.69 | -2.22 % |
| 2000 | 35,596.40 | -0.45 % |
| 2001 | 33,113.62 | -6.97 % |
| 2002 | 32,013.80 | -3.32 % |
| 2003 | 32,492.66 | 1.50 % |
| 2004 | 35,491.81 | 9.23 % |
| 2005 | 36,498.42 | 2.84 % |
| 2006 | 37,021.58 | 1.43 % |
| 2007 | 37,712.44 | 1.87 % |
| 2008 | 41,162.75 | 9.15 % |
| 2009 | 35,888.19 | -12.81 % |
| 2010 | 43,296.76 | 20.64 % |
| 2011 | 45,689.29 | 5.53 % |
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