|
| year | consumption | change |
| 1980 | 57.73 | NA |
| 1981 | 56.02 | -2.97 % |
| 1982 | 55.57 | -0.80 % |
| 1983 | 55.89 | 0.58 % |
| 1984 | 57.22 | 2.38 % |
| 1985 | 59.08 | 3.24 % |
| 1986 | 60.22 | 1.93 % |
| 1987 | 61.63 | 2.34 % |
| 1988 | 62.08 | 0.73 % |
| 1989 | 62.91 | 1.33 % |
| 1990 | 61.95 | -1.52 % |
| 1991 | 73.35 | 18.40 % |
| 1992 | 118.24 | 61.20 % |
| 1993 | 115.99 | -1.90 % |
| 1994 | 113.17 | -2.43 % |
| 1995 | 113.58 | 0.36 % |
| 1996 | 113.76 | 0.16 % |
| 1997 | 111.99 | -1.56 % |
| 1998 | 112.29 | 0.27 % |
| 1999 | 113.11 | 0.73 % |
| 2000 | 115.37 | 2.00 % |
| 2001 | 115.88 | 0.45 % |
| 2002 | 116.87 | 0.86 % |
| 2003 | 119.77 | 2.47 % |
| 2004 | 122.32 | 2.13 % |
| 2005 | 122.19 | -0.11 % |
| 2006 | 122.06 | -0.10 % |
| 2007 | 123.92 | 1.52 % |
| 2008 | 123.69 | -0.19 % |
| 2009 | 115.40 | -6.70 % |
| 2010 | 120.33 | 4.27 % |
|
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