|
| year | consumption | change |
| 1984 | 72.92 | NA |
| 1985 | 68.38 | -6.22 % |
| 1986 | 71.97 | 5.24 % |
| 1987 | 68.05 | -5.44 % |
| 1988 | 69.93 | 2.76 % |
| 1989 | 77.52 | 10.85 % |
| 1990 | 71.47 | -7.80 % |
| 1991 | 83.21 | 16.42 % |
| 1992 | 87.77 | 5.48 % |
| 1993 | 90.52 | 3.13 % |
| 1994 | 99.92 | 10.38 % |
| 1995 | 101.49 | 1.57 % |
| 1996 | 105.46 | 3.91 % |
| 1997 | 114.50 | 8.57 % |
| 1998 | 115.71 | 1.05 % |
| 1999 | 133.23 | 15.14 % |
| 2000 | 115.55 | -13.27 % |
| 2001 | 107.17 | -7.26 % |
| 2002 | 97.84 | -8.71 % |
| 2003 | 94.66 | -3.24 % |
| 2004 | 95.03 | 0.39 % |
| 2005 | 92.79 | -2.36 % |
| 2006 | 95.93 | 3.39 % |
| 2007 | 96.33 | 0.41 % |
| 2008 | 96.90 | 0.59 % |
| 2009 | 98.90 | 2.07 % |
| 2010 | 98.09 | -0.82 % |
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