|
| year | consumption | change |
| 1984 | 5,794.02 | NA |
| 1985 | 5,132.28 | -11.42 % |
| 1986 | 12,415.74 | 141.91 % |
| 1987 | 12,259.83 | -1.26 % |
| 1988 | 12,367.17 | 0.88 % |
| 1989 | 12,584.71 | 1.76 % |
| 1990 | 12,481.13 | -0.82 % |
| 1991 | 12,583.28 | 0.82 % |
| 1992 | 11,755.17 | -6.58 % |
| 1993 | 11,361.36 | -3.35 % |
| 1994 | 11,243.97 | -1.03 % |
| 1995 | 11,207.39 | -0.33 % |
| 1996 | 10,764.67 | -3.95 % |
| 1997 | 11,087.92 | 3.00 % |
| 1998 | 11,193.69 | 0.95 % |
| 1999 | 10,850.62 | -3.06 % |
| 2000 | 10,452.82 | -3.67 % |
| 2001 | 10,332.35 | -1.15 % |
| 2002 | 10,285.14 | -0.46 % |
| 2003 | 10,159.38 | -1.22 % |
| 2004 | 10,098.81 | -0.60 % |
| 2005 | 10,424.54 | 3.23 % |
| 2006 | 10,013.55 | -3.94 % |
| 2007 | 9,742.59 | -2.71 % |
| 2008 | 9,296.84 | -4.58 % |
| 2009 | 8,950.14 | -3.73 % |
| 2010 | 8,897.08 | -0.59 % |
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