|
| year | consumption | change |
| 1984 | 38.60 | NA |
| 1985 | 41.55 | 7.64 % |
| 1986 | 43.25 | 4.07 % |
| 1987 | 46.25 | 6.96 % |
| 1988 | 49.33 | 6.66 % |
| 1989 | 53.83 | 9.11 % |
| 1990 | 56.09 | 4.21 % |
| 1991 | 57.90 | 3.22 % |
| 1992 | 59.61 | 2.96 % |
| 1993 | 61.21 | 2.68 % |
| 1994 | 62.39 | 1.93 % |
| 1995 | 64.22 | 2.94 % |
| 1996 | 67.88 | 5.69 % |
| 1997 | 70.27 | 3.52 % |
| 1998 | 73.06 | 3.98 % |
| 1999 | 74.43 | 1.87 % |
| 2000 | 75.73 | 1.75 % |
| 2001 | 78.37 | 3.48 % |
| 2002 | 82.02 | 4.67 % |
| 2003 | 85.31 | 4.01 % |
| 2004 | 86.87 | 1.83 % |
| 2005 | 90.70 | 4.41 % |
| 2006 | 91.66 | 1.05 % |
| 2007 | 95.78 | 4.49 % |
| 2008 | 93.72 | -2.15 % |
| 2009 | 94.22 | 0.54 % |
| 2010 | 86.13 | -8.59 % |
|
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