|
| year | consumption | change |
| 1984 | 552.05 | NA |
| 1985 | 545.62 | -1.17 % |
| 1986 | 553.52 | 1.45 % |
| 1987 | 575.64 | 4.00 % |
| 1988 | 574.76 | -0.15 % |
| 1989 | 577.48 | 0.47 % |
| 1990 | 565.95 | -2.00 % |
| 1991 | 567.59 | 0.29 % |
| 1992 | 552.12 | -2.73 % |
| 1993 | 541.00 | -2.01 % |
| 1994 | 499.48 | -7.68 % |
| 1995 | 515.88 | 3.28 % |
| 1996 | 509.24 | -1.29 % |
| 1997 | 513.53 | 0.84 % |
| 1998 | 530.78 | 3.36 % |
| 1999 | 550.73 | 3.76 % |
| 2000 | 561.79 | 2.01 % |
| 2001 | 579.87 | 3.22 % |
| 2002 | 599.72 | 3.42 % |
| 2003 | 598.14 | -0.26 % |
| 2004 | 639.20 | 6.86 % |
| 2005 | 649.45 | 1.60 % |
| 2006 | 656.55 | 1.09 % |
| 2007 | 657.95 | 0.21 % |
| 2008 | 642.04 | -2.42 % |
| 2009 | 617.11 | -3.88 % |
| 2010 | 610.88 | -1.01 % |
|
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