|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 121.21 | NA |
| 1987 | 126.85 | 4.66 % |
| 1988 | 127.96 | 0.87 % |
| 1989 | 120.19 | -6.07 % |
| 1990 | 127.34 | 5.95 % |
| 1991 | 133.81 | 5.08 % |
| 1992 | 128.79 | -3.75 % |
| 1993 | 124.45 | -3.37 % |
| 1994 | 124.58 | 0.10 % |
| 1995 | 124.94 | 0.29 % |
| 1996 | 151.57 | 21.32 % |
| 1997 | 111.81 | -26.24 % |
| 1998 | 121.61 | 8.77 % |
| 1999 | 109.86 | -9.66 % |
| 2000 | 116.82 | 6.33 % |
| 2001 | 124.90 | 6.92 % |
| 2002 | 120.97 | -3.15 % |
| 2003 | 108.51 | -10.30 % |
| 2004 | 104.28 | -3.89 % |
| 2005 | 110.11 | 5.59 % |
| 2006 | 114.43 | 3.92 % |
| 2007 | 118.33 | 3.41 % |
| 2008 | 88.50 | -25.21 % |
| 2009 | 80.08 | -9.52 % |
| 2010 | 109.90 | 37.25 % |
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