|
| year | consumption | change |
| 1984 | 79.27 | NA |
| 1985 | 79.85 | 0.74 % |
| 1986 | 82.37 | 3.15 % |
| 1987 | 86.95 | 5.56 % |
| 1988 | 85.59 | -1.56 % |
| 1989 | 84.27 | -1.54 % |
| 1990 | 85.75 | 1.76 % |
| 1991 | 82.96 | -3.26 % |
| 1992 | 82.04 | -1.11 % |
| 1993 | 79.17 | -3.50 % |
| 1994 | 82.33 | 4.00 % |
| 1995 | 80.73 | -1.94 % |
| 1996 | 81.71 | 1.21 % |
| 1997 | 82.45 | 0.90 % |
| 1998 | 83.90 | 1.76 % |
| 1999 | 85.35 | 1.73 % |
| 2000 | 81.69 | -4.29 % |
| 2001 | 83.92 | 2.73 % |
| 2002 | 85.41 | 1.78 % |
| 2003 | 91.12 | 6.68 % |
| 2004 | 88.32 | -3.07 % |
| 2005 | 86.33 | -2.25 % |
| 2006 | 86.66 | 0.38 % |
| 2007 | 85.84 | -0.95 % |
| 2008 | 86.52 | 0.79 % |
| 2009 | 83.68 | -3.29 % |
| 2010 | 88.99 | 6.35 % |
|
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