|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 52.58 | NA |
| 1987 | 57.78 | 9.89 % |
| 1988 | 65.60 | 13.52 % |
| 1989 | 66.62 | 1.56 % |
| 1990 | 61.13 | -8.24 % |
| 1991 | 65.52 | 7.17 % |
| 1992 | 73.47 | 12.14 % |
| 1993 | 74.16 | 0.94 % |
| 1994 | 79.81 | 7.62 % |
| 1995 | 79.83 | 0.03 % |
| 1996 | 66.86 | -16.24 % |
| 1997 | 86.88 | 29.94 % |
| 1998 | 86.33 | -0.63 % |
| 1999 | 88.66 | 2.70 % |
| 2000 | 87.37 | -1.46 % |
| 2001 | 93.28 | 6.77 % |
| 2002 | 94.13 | 0.91 % |
| 2003 | 68.44 | -27.29 % |
| 2004 | 58.71 | -14.23 % |
| 2005 | 64.44 | 9.76 % |
| 2006 | 55.58 | -13.75 % |
| 2007 | 51.09 | -8.07 % |
| 2008 | 52.42 | 2.61 % |
| 2009 | 39.98 | -23.73 % |
| 2010 | 40.57 | 1.48 % |
|
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