|
| year | consumption | change |
| 1984 | 331.41 | NA |
| 1985 | 345.33 | 4.20 % |
| 1986 | 355.74 | 3.01 % |
| 1987 | 368.98 | 3.72 % |
| 1988 | 374.46 | 1.49 % |
| 1989 | 419.00 | 11.89 % |
| 1990 | 468.58 | 11.83 % |
| 1991 | 513.74 | 9.64 % |
| 1992 | 503.19 | -2.05 % |
| 1993 | 501.46 | -0.34 % |
| 1994 | 499.94 | -0.30 % |
| 1995 | 477.85 | -4.42 % |
| 1996 | 478.49 | 0.13 % |
| 1997 | 486.60 | 1.69 % |
| 1998 | 520.59 | 6.99 % |
| 1999 | 520.18 | -0.08 % |
| 2000 | 534.34 | 2.72 % |
| 2001 | 551.68 | 3.25 % |
| 2002 | 564.46 | 2.32 % |
| 2003 | 589.97 | 4.52 % |
| 2004 | 624.84 | 5.91 % |
| 2005 | 658.98 | 5.46 % |
| 2006 | 704.08 | 6.84 % |
| 2007 | 744.94 | 5.80 % |
| 2008 | 775.02 | 4.04 % |
| 2009 | 775.27 | 0.03 % |
| 2010 | 784.48 | 1.19 % |
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