|
| year | consumption | change |
| 1984 | 6,692.52 | NA |
| 1985 | 6,831.13 | 2.07 % |
| 1986 | 7,034.07 | 2.97 % |
| 1987 | 7,205.72 | 2.44 % |
| 1988 | 7,336.46 | 1.81 % |
| 1989 | 7,327.86 | -0.12 % |
| 1990 | 7,234.91 | -1.27 % |
| 1991 | 7,187.52 | -0.66 % |
| 1992 | 7,267.52 | 1.11 % |
| 1993 | 7,476.30 | 2.87 % |
| 1994 | 7,601.37 | 1.67 % |
| 1995 | 7,788.64 | 2.46 % |
| 1996 | 7,890.58 | 1.31 % |
| 1997 | 8,016.84 | 1.60 % |
| 1998 | 8,253.42 | 2.95 % |
| 1999 | 8,430.80 | 2.15 % |
| 2000 | 8,472.06 | 0.49 % |
| 2001 | 8,610.03 | 1.63 % |
| 2002 | 8,847.83 | 2.76 % |
| 2003 | 8,934.90 | 0.98 % |
| 2004 | 9,105.41 | 1.91 % |
| 2005 | 9,159.26 | 0.59 % |
| 2006 | 9,252.53 | 1.02 % |
| 2007 | 9,285.67 | 0.36 % |
| 2008 | 8,989.23 | -3.19 % |
| 2009 | 8,996.52 | 0.08 % |
| 2010 | 8,992.66 | -0.04 % |
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