|
| year | consumption | change |
| 1984 | 227.37 | NA |
| 1985 | 197.94 | -12.95 % |
| 1986 | 175.07 | -11.55 % |
| 1987 | 175.01 | -0.04 % |
| 1988 | 163.50 | -6.57 % |
| 1989 | 181.82 | 11.21 % |
| 1990 | 174.09 | -4.25 % |
| 1991 | 195.85 | 12.50 % |
| 1992 | 164.93 | -15.79 % |
| 1993 | 150.67 | -8.65 % |
| 1994 | 137.45 | -8.78 % |
| 1995 | 151.80 | 10.44 % |
| 1996 | 156.36 | 3.00 % |
| 1997 | 151.76 | -2.94 % |
| 1998 | 162.88 | 7.33 % |
| 1999 | 148.55 | -8.80 % |
| 2000 | 136.39 | -8.19 % |
| 2001 | 124.26 | -8.89 % |
| 2002 | 114.59 | -7.78 % |
| 2003 | 115.75 | 1.01 % |
| 2004 | 117.72 | 1.70 % |
| 2005 | 118.13 | 0.35 % |
| 2006 | 119.44 | 1.11 % |
| 2007 | 113.22 | -5.21 % |
| 2008 | 104.44 | -7.76 % |
| 2009 | 98.96 | -5.25 % |
| 2010 | 90.82 | -8.22 % |
|
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