|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 44.68 | NA |
| 1987 | 57.41 | 28.48 % |
| 1988 | 56.77 | -1.11 % |
| 1989 | 53.17 | -6.34 % |
| 1990 | 62.90 | 18.30 % |
| 1991 | 40.95 | -34.90 % |
| 1992 | 42.37 | 3.46 % |
| 1993 | 64.98 | 53.37 % |
| 1994 | 72.43 | 11.47 % |
| 1995 | 74.24 | 2.50 % |
| 1996 | 78.08 | 5.17 % |
| 1997 | 78.65 | 0.73 % |
| 1998 | 78.46 | -0.25 % |
| 1999 | 80.77 | 2.94 % |
| 2000 | 80.54 | -0.29 % |
| 2001 | 84.90 | 5.42 % |
| 2002 | 92.28 | 8.70 % |
| 2003 | 92.80 | 0.56 % |
| 2004 | 78.04 | -15.90 % |
| 2005 | 88.01 | 12.77 % |
| 2006 | 84.86 | -3.58 % |
| 2007 | 105.94 | 24.84 % |
| 2008 | 126.19 | 19.12 % |
| 2009 | 114.38 | -9.36 % |
| 2010 | 103.48 | -9.53 % |
|
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