|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 91.60 | NA |
| 1987 | 96.41 | 5.25 % |
| 1988 | 101.31 | 5.08 % |
| 1989 | 111.43 | 10.00 % |
| 1990 | 106.18 | -4.71 % |
| 1991 | 110.89 | 4.44 % |
| 1992 | 120.19 | 8.38 % |
| 1993 | 121.03 | 0.70 % |
| 1994 | 125.08 | 3.35 % |
| 1995 | 113.82 | -9.00 % |
| 1996 | 129.60 | 13.86 % |
| 1997 | 134.91 | 4.09 % |
| 1998 | 132.74 | -1.60 % |
| 1999 | 114.84 | -13.49 % |
| 2000 | 104.34 | -9.14 % |
| 2001 | 93.48 | -10.41 % |
| 2002 | 92.83 | -0.70 % |
| 2003 | 92.71 | -0.13 % |
| 2004 | 103.06 | 11.17 % |
| 2005 | 93.18 | -9.59 % |
| 2006 | 78.08 | -16.20 % |
| 2007 | 74.67 | -4.37 % |
| 2008 | 71.79 | -3.85 % |
| 2009 | 58.75 | -18.16 % |
| 2010 | 62.68 | 6.68 % |
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