|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 455.38 | NA |
| 1987 | 464.73 | 2.05 % |
| 1988 | 464.33 | -0.08 % |
| 1989 | 459.52 | -1.04 % |
| 1990 | 441.84 | -3.85 % |
| 1991 | 429.61 | -2.77 % |
| 1992 | 428.53 | -0.25 % |
| 1993 | 402.49 | -6.08 % |
| 1994 | 431.42 | 7.19 % |
| 1995 | 459.59 | 6.53 % |
| 1996 | 475.75 | 3.52 % |
| 1997 | 471.91 | -0.81 % |
| 1998 | 483.97 | 2.55 % |
| 1999 | 458.59 | -5.24 % |
| 2000 | 456.93 | -0.36 % |
| 2001 | 430.09 | -5.87 % |
| 2002 | 438.27 | 1.90 % |
| 2003 | 377.60 | -13.84 % |
| 2004 | 405.91 | 7.50 % |
| 2005 | 452.01 | 11.36 % |
| 2006 | 464.97 | 2.87 % |
| 2007 | 462.66 | -0.50 % |
| 2008 | 492.99 | 6.55 % |
| 2009 | 473.61 | -3.93 % |
| 2010 | 512.35 | 8.18 % |
|
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