|
| year | consumption | change |
| 1980 | 11,568.63 | NA |
| 1981 | 11,589.17 | 0.18 % |
| 1982 | 11,463.82 | -1.08 % |
| 1983 | 11,686.57 | 1.94 % |
| 1984 | 12,119.05 | 3.70 % |
| 1985 | 12,302.57 | 1.51 % |
| 1986 | 12,789.93 | 3.96 % |
| 1987 | 13,261.43 | 3.69 % |
| 1988 | 14,147.33 | 6.68 % |
| 1989 | 14,953.80 | 5.70 % |
| 1990 | 15,762.82 | 5.41 % |
| 1991 | 16,416.93 | 4.15 % |
| 1992 | 18,340.51 | 11.72 % |
| 1993 | 19,104.17 | 4.16 % |
| 1994 | 20,193.53 | 5.70 % |
| 1995 | 21,042.93 | 4.21 % |
| 1996 | 21,789.72 | 3.55 % |
| 1997 | 22,617.25 | 3.80 % |
| 1998 | 22,514.27 | -0.46 % |
| 1999 | 23,484.87 | 4.31 % |
| 2000 | 24,133.53 | 2.76 % |
| 2001 | 24,399.31 | 1.10 % |
| 2002 | 24,951.87 | 2.26 % |
| 2003 | 25,872.85 | 3.69 % |
| 2004 | 27,258.61 | 5.36 % |
| 2005 | 28,018.69 | 2.79 % |
| 2006 | 28,932.92 | 3.26 % |
| 2007 | 29,568.40 | 2.20 % |
| 2008 | 29,280.91 | -0.97 % |
| 2009 | 30,954.03 | 5.71 % |
| 2010 | 32,648.54 | 5.47 % |
| 2011 | 32,887.68 | 0.73 % |
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