|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 60.81 | NA |
| 1987 | 79.56 | 30.83 % |
| 1988 | 77.66 | -2.39 % |
| 1989 | 91.77 | 18.17 % |
| 1990 | 86.05 | -6.23 % |
| 1991 | 82.20 | -4.47 % |
| 1992 | 98.59 | 19.94 % |
| 1993 | 87.88 | -10.87 % |
| 1994 | 93.83 | 6.78 % |
| 1995 | 105.29 | 12.21 % |
| 1996 | 111.68 | 6.07 % |
| 1997 | 129.45 | 15.91 % |
| 1998 | 130.00 | 0.43 % |
| 1999 | 115.64 | -11.05 % |
| 2000 | 92.10 | -20.36 % |
| 2001 | 87.01 | -5.52 % |
| 2002 | 75.02 | -13.77 % |
| 2003 | 69.12 | -7.87 % |
| 2004 | 74.46 | 7.73 % |
| 2005 | 60.88 | -18.23 % |
| 2006 | 51.02 | -16.19 % |
| 2007 | 52.28 | 2.46 % |
| 2008 | 44.18 | -15.49 % |
| 2009 | 42.14 | -4.61 % |
| 2010 | 46.28 | 9.81 % |
|
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