|
| year | consumption | change |
| 1984 | 2,472.89 | NA |
| 1985 | 2,180.78 | -11.81 % |
| 1986 | 2,525.92 | 15.83 % |
| 1987 | 2,488.05 | -1.50 % |
| 1988 | 2,474.16 | -0.56 % |
| 1989 | 2,479.65 | 0.22 % |
| 1990 | 2,466.51 | -0.53 % |
| 1991 | 2,569.49 | 4.18 % |
| 1992 | 4,311.25 | 67.79 % |
| 1993 | 3,823.82 | -11.31 % |
| 1994 | 3,543.20 | -7.34 % |
| 1995 | 3,737.52 | 5.48 % |
| 1996 | 3,519.09 | -5.84 % |
| 1997 | 3,400.90 | -3.36 % |
| 1998 | 3,338.79 | -1.83 % |
| 1999 | 3,126.99 | -6.34 % |
| 2000 | 2,927.62 | -6.38 % |
| 2001 | 2,930.81 | 0.11 % |
| 2002 | 2,943.57 | 0.44 % |
| 2003 | 2,717.80 | -7.67 % |
| 2004 | 2,569.64 | -5.45 % |
| 2005 | 2,578.30 | 0.34 % |
| 2006 | 2,500.10 | -3.03 % |
| 2007 | 2,225.55 | -10.98 % |
| 2008 | 2,080.50 | -6.52 % |
| 2009 | 1,970.72 | -5.28 % |
| 2010 | 1,753.63 | -11.02 % |
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