|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 385.26 | NA |
| 1987 | 408.79 | 6.11 % |
| 1988 | 425.43 | 4.07 % |
| 1989 | 432.43 | 1.65 % |
| 1990 | 423.96 | -1.96 % |
| 1991 | 441.10 | 4.04 % |
| 1992 | 452.87 | 2.67 % |
| 1993 | 465.44 | 2.77 % |
| 1994 | 484.55 | 4.11 % |
| 1995 | 517.78 | 6.86 % |
| 1996 | 536.60 | 3.63 % |
| 1997 | 569.67 | 6.16 % |
| 1998 | 600.48 | 5.41 % |
| 1999 | 611.55 | 1.84 % |
| 2000 | 624.60 | 2.13 % |
| 2001 | 656.04 | 5.03 % |
| 2002 | 666.82 | 1.64 % |
| 2003 | 656.85 | -1.49 % |
| 2004 | 699.37 | 6.47 % |
| 2005 | 731.99 | 4.66 % |
| 2006 | 733.23 | 0.17 % |
| 2007 | 756.02 | 3.11 % |
| 2008 | 792.70 | 4.85 % |
| 2009 | 758.00 | -4.38 % |
| 2010 | 854.99 | 12.80 % |
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