|
| year | consumption | change |
| 1984 | 116.37 | NA |
| 1985 | 123.19 | 5.85 % |
| 1986 | 125.13 | 1.57 % |
| 1987 | 119.71 | -4.33 % |
| 1988 | 118.83 | -0.73 % |
| 1989 | 111.16 | -6.45 % |
| 1990 | 107.31 | -3.47 % |
| 1991 | 102.36 | -4.61 % |
| 1992 | 107.94 | 5.46 % |
| 1993 | 106.02 | -1.78 % |
| 1994 | 113.37 | 6.93 % |
| 1995 | 113.16 | -0.18 % |
| 1996 | 120.18 | 6.20 % |
| 1997 | 115.78 | -3.66 % |
| 1998 | 120.06 | 3.70 % |
| 1999 | 117.54 | -2.10 % |
| 2000 | 111.01 | -5.56 % |
| 2001 | 107.77 | -2.92 % |
| 2002 | 107.45 | -0.29 % |
| 2003 | 112.59 | 4.79 % |
| 2004 | 104.77 | -6.95 % |
| 2005 | 102.31 | -2.35 % |
| 2006 | 95.79 | -6.37 % |
| 2007 | 96.65 | 0.89 % |
| 2008 | 93.58 | -3.17 % |
| 2009 | 93.21 | -0.40 % |
| 2010 | 113.79 | 22.08 % |
|
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