|
| year | consumption | change |
| 1984 | 7,588.19 | NA |
| 1985 | 7,739.13 | 1.99 % |
| 1986 | 7,955.46 | 2.80 % |
| 1987 | 8,146.27 | 2.40 % |
| 1988 | 8,296.56 | 1.85 % |
| 1989 | 8,345.67 | 0.59 % |
| 1990 | 8,287.25 | -0.70 % |
| 1991 | 8,265.86 | -0.26 % |
| 1992 | 8,341.83 | 0.92 % |
| 1993 | 8,563.23 | 2.65 % |
| 1994 | 8,703.08 | 1.63 % |
| 1995 | 8,869.46 | 1.91 % |
| 1996 | 8,978.03 | 1.22 % |
| 1997 | 9,128.96 | 1.68 % |
| 1998 | 9,416.75 | 3.15 % |
| 1999 | 9,610.13 | 2.05 % |
| 2000 | 9,664.07 | 0.56 % |
| 2001 | 9,829.31 | 1.71 % |
| 2002 | 10,093.46 | 2.69 % |
| 2003 | 10,216.90 | 1.22 % |
| 2004 | 10,433.53 | 2.12 % |
| 2005 | 10,520.81 | 0.84 % |
| 2006 | 10,660.77 | 1.33 % |
| 2007 | 10,756.71 | 0.90 % |
| 2008 | 10,483.39 | -2.54 % |
| 2009 | 10,502.55 | 0.18 % |
| 2010 | 10,532.99 | 0.29 % |
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