|
| year | consumption | change |
| 1984 | 383.99 | NA |
| 1985 | 406.80 | 5.94 % |
| 1986 | 426.49 | 4.84 % |
| 1987 | 464.04 | 8.80 % |
| 1988 | 470.98 | 1.50 % |
| 1989 | 501.90 | 6.57 % |
| 1990 | 400.21 | -20.26 % |
| 1991 | 424.33 | 6.03 % |
| 1992 | 412.53 | -2.78 % |
| 1993 | 420.34 | 1.89 % |
| 1994 | 474.44 | 12.87 % |
| 1995 | 418.75 | -11.74 % |
| 1996 | 443.14 | 5.83 % |
| 1997 | 483.38 | 9.08 % |
| 1998 | 513.67 | 6.27 % |
| 1999 | 494.15 | -3.80 % |
| 2000 | 510.92 | 3.39 % |
| 2001 | 492.87 | -3.53 % |
| 2002 | 436.74 | -11.39 % |
| 2003 | 370.21 | -15.23 % |
| 2004 | 357.88 | -3.33 % |
| 2005 | 393.02 | 9.82 % |
| 2006 | 311.09 | -20.85 % |
| 2007 | 322.56 | 3.69 % |
| 2008 | 254.86 | -20.99 % |
| 2009 | 236.79 | -7.09 % |
| 2010 | 208.98 | -11.74 % |
|
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