|
| year | consumption | change |
| 1980 | 1,155.04 | NA |
| 1981 | 1,197.09 | 3.64 % |
| 1982 | 1,231.89 | 2.91 % |
| 1983 | 1,196.08 | -2.91 % |
| 1984 | 1,214.73 | 1.56 % |
| 1985 | 1,229.24 | 1.19 % |
| 1986 | 1,246.66 | 1.42 % |
| 1987 | 1,292.54 | 3.68 % |
| 1988 | 1,359.09 | 5.15 % |
| 1989 | 1,454.66 | 7.03 % |
| 1990 | 1,553.72 | 6.81 % |
| 1991 | 1,578.04 | 1.57 % |
| 1992 | 1,607.32 | 1.86 % |
| 1993 | 1,703.11 | 5.96 % |
| 1994 | 1,760.59 | 3.38 % |
| 1995 | 1,811.55 | 2.89 % |
| 1996 | 1,880.53 | 3.81 % |
| 1997 | 1,988.77 | 5.76 % |
| 1998 | 1,950.79 | -1.91 % |
| 1999 | 2,036.85 | 4.41 % |
| 2000 | 2,107.91 | 3.49 % |
| 2001 | 2,150.38 | 2.01 % |
| 2002 | 2,220.63 | 3.27 % |
| 2003 | 2,257.38 | 1.66 % |
| 2004 | 2,376.43 | 5.27 % |
| 2005 | 2,470.20 | 3.95 % |
| 2006 | 2,462.17 | -0.32 % |
| 2007 | 2,446.93 | -0.62 % |
| 2008 | 2,425.33 | -0.88 % |
| 2009 | 2,494.72 | 2.86 % |
| 2010 | 2,591.81 | 3.89 % |
| 2011 | 2,363.59 | -8.81 % |
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