|
| year | consumption | change |
| 1984 | 375.17 | NA |
| 1985 | 378.96 | 1.01 % |
| 1986 | 385.44 | 1.71 % |
| 1987 | 375.51 | -2.58 % |
| 1988 | 394.85 | 5.15 % |
| 1989 | 412.77 | 4.54 % |
| 1990 | 414.39 | 0.39 % |
| 1991 | 419.38 | 1.20 % |
| 1992 | 426.56 | 1.71 % |
| 1993 | 437.62 | 2.59 % |
| 1994 | 455.36 | 4.05 % |
| 1995 | 459.05 | 0.81 % |
| 1996 | 484.22 | 5.48 % |
| 1997 | 496.13 | 2.46 % |
| 1998 | 501.91 | 1.16 % |
| 1999 | 503.94 | 0.41 % |
| 2000 | 511.46 | 1.49 % |
| 2001 | 511.91 | 0.09 % |
| 2002 | 503.87 | -1.57 % |
| 2003 | 518.03 | 2.81 % |
| 2004 | 526.27 | 1.59 % |
| 2005 | 559.02 | 6.22 % |
| 2006 | 570.95 | 2.13 % |
| 2007 | 579.59 | 1.51 % |
| 2008 | 570.42 | -1.58 % |
| 2009 | 552.13 | -3.21 % |
| 2010 | 569.90 | 3.22 % |
|
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