|
| year | consumption | change |
| 1984 | 3,477.64 | NA |
| 1985 | 3,509.70 | 0.92 % |
| 1986 | 3,542.31 | 0.93 % |
| 1987 | 3,606.86 | 1.82 % |
| 1988 | 3,754.44 | 4.09 % |
| 1989 | 3,818.37 | 1.70 % |
| 1990 | 3,670.91 | -3.86 % |
| 1991 | 3,566.50 | -2.84 % |
| 1992 | 3,633.01 | 1.86 % |
| 1993 | 3,701.72 | 1.89 % |
| 1994 | 3,883.75 | 4.92 % |
| 1995 | 3,914.63 | 0.80 % |
| 1996 | 4,113.54 | 5.08 % |
| 1997 | 4,223.56 | 2.67 % |
| 1998 | 4,261.79 | 0.91 % |
| 1999 | 4,375.06 | 2.66 % |
| 2000 | 4,556.15 | 4.14 % |
| 2001 | 4,655.61 | 2.18 % |
| 2002 | 4,571.02 | -1.82 % |
| 2003 | 4,773.87 | 4.44 % |
| 2004 | 4,937.58 | 3.43 % |
| 2005 | 5,027.30 | 1.82 % |
| 2006 | 5,097.46 | 1.40 % |
| 2007 | 5,168.05 | 1.38 % |
| 2008 | 4,928.47 | -4.64 % |
| 2009 | 4,549.48 | -7.69 % |
| 2010 | 4,766.86 | 4.78 % |
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