|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | 214.14 | NA |
| 1992 | 206.84 | -3.41 % |
| 1993 | 194.08 | -6.17 % |
| 1994 | 185.68 | -4.33 % |
| 1995 | 195.02 | 5.03 % |
| 1996 | 176.17 | -9.67 % |
| 1997 | 155.63 | -11.66 % |
| 1998 | 160.26 | 2.97 % |
| 1999 | 146.68 | -8.47 % |
| 2000 | 168.13 | 14.62 % |
| 2001 | 182.80 | 8.73 % |
| 2002 | 182.40 | -0.22 % |
| 2003 | 183.21 | 0.44 % |
| 2004 | 181.24 | -1.08 % |
| 2005 | 175.78 | -3.01 % |
| 2006 | 177.93 | 1.23 % |
| 2007 | 163.46 | -8.13 % |
| 2008 | 172.10 | 5.28 % |
| 2009 | 158.96 | -7.64 % |
| 2010 | 154.91 | -2.55 % |
|
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