|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 146.41 | NA |
| 1987 | 152.55 | 4.20 % |
| 1988 | 149.30 | -2.13 % |
| 1989 | 163.58 | 9.56 % |
| 1990 | 170.60 | 4.29 % |
| 1991 | 166.39 | -2.47 % |
| 1992 | 183.41 | 10.23 % |
| 1993 | 186.69 | 1.79 % |
| 1994 | 199.01 | 6.60 % |
| 1995 | 203.40 | 2.21 % |
| 1996 | 191.67 | -5.77 % |
| 1997 | 199.21 | 3.94 % |
| 1998 | 214.40 | 7.63 % |
| 1999 | 231.29 | 7.88 % |
| 2000 | 221.85 | -4.08 % |
| 2001 | 247.63 | 11.62 % |
| 2002 | 241.68 | -2.40 % |
| 2003 | 257.93 | 6.73 % |
| 2004 | 266.60 | 3.36 % |
| 2005 | 264.17 | -0.91 % |
| 2006 | 257.49 | -2.53 % |
| 2007 | 299.12 | 16.17 % |
| 2008 | 272.65 | -8.85 % |
| 2009 | 257.02 | -5.73 % |
| 2010 | 276.96 | 7.76 % |
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