|
| year | consumption | change |
| 1984 | 4,572.91 | NA |
| 1985 | 4,670.16 | 2.13 % |
| 1986 | 8,452.48 | 80.99 % |
| 1987 | 8,640.02 | 2.22 % |
| 1988 | 8,908.50 | 3.11 % |
| 1989 | 8,607.26 | -3.38 % |
| 1990 | 8,415.15 | -2.23 % |
| 1991 | 8,967.56 | 6.56 % |
| 1992 | 9,742.00 | 8.64 % |
| 1993 | 9,551.62 | -1.95 % |
| 1994 | 9,981.89 | 4.50 % |
| 1995 | 10,267.58 | 2.86 % |
| 1996 | 11,110.01 | 8.20 % |
| 1997 | 11,351.88 | 2.18 % |
| 1998 | 11,905.88 | 4.88 % |
| 1999 | 12,295.82 | 3.28 % |
| 2000 | 12,307.92 | 0.10 % |
| 2001 | 12,515.13 | 1.68 % |
| 2002 | 12,966.06 | 3.60 % |
| 2003 | 13,539.73 | 4.42 % |
| 2004 | 14,414.53 | 6.46 % |
| 2005 | 14,615.42 | 1.39 % |
| 2006 | 15,063.82 | 3.07 % |
| 2007 | 14,684.40 | -2.52 % |
| 2008 | 14,153.28 | -3.62 % |
| 2009 | 15,284.07 | 7.99 % |
| 2010 | 15,862.50 | 3.78 % |
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