|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 488.63 | NA |
| 1987 | 512.07 | 4.80 % |
| 1988 | 523.69 | 2.27 % |
| 1989 | 553.43 | 5.68 % |
| 1990 | 570.54 | 3.09 % |
| 1991 | 567.18 | -0.59 % |
| 1992 | 594.98 | 4.90 % |
| 1993 | 600.55 | 0.93 % |
| 1994 | 609.12 | 1.43 % |
| 1995 | 626.44 | 2.84 % |
| 1996 | 627.49 | 0.17 % |
| 1997 | 673.28 | 7.30 % |
| 1998 | 659.11 | -2.11 % |
| 1999 | 690.83 | 4.81 % |
| 2000 | 738.99 | 6.97 % |
| 2001 | 768.53 | 4.00 % |
| 2002 | 802.49 | 4.42 % |
| 2003 | 893.79 | 11.38 % |
| 2004 | 912.41 | 2.08 % |
| 2005 | 961.79 | 5.41 % |
| 2006 | 988.05 | 2.73 % |
| 2007 | 1,081.18 | 9.43 % |
| 2008 | 1,136.58 | 5.12 % |
| 2009 | 1,200.66 | 5.64 % |
| 2010 | 1,174.27 | -2.20 % |
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