|
| year | consumption | change |
| 1980 | 1,148.00 | NA |
| 1981 | 1,085.00 | -5.49 % |
| 1982 | 1,061.00 | -2.21 % |
| 1983 | 980.00 | -7.63 % |
| 1984 | 1,033.00 | 5.41 % |
| 1985 | 1,079.38 | 4.49 % |
| 1986 | 1,237.71 | 14.67 % |
| 1987 | 1,263.14 | 2.05 % |
| 1988 | 1,300.00 | 2.92 % |
| 1989 | 1,317.13 | 1.32 % |
| 1990 | 1,466.49 | 11.34 % |
| 1991 | 1,484.22 | 1.21 % |
| 1992 | 1,521.00 | 2.48 % |
| 1993 | 1,579.66 | 3.86 % |
| 1994 | 1,673.94 | 5.97 % |
| 1995 | 1,788.43 | 6.84 % |
| 1996 | 1,904.35 | 6.48 % |
| 1997 | 2,030.68 | 6.63 % |
| 1998 | 2,095.92 | 3.21 % |
| 1999 | 2,130.31 | 1.64 % |
| 2000 | 2,166.29 | 1.69 % |
| 2001 | 2,206.08 | 1.84 % |
| 2002 | 2,131.60 | -3.38 % |
| 2003 | 2,055.68 | -3.56 % |
| 2004 | 2,122.81 | 3.27 % |
| 2005 | 2,206.22 | 3.93 % |
| 2006 | 2,287.03 | 3.66 % |
| 2007 | 2,355.08 | 2.98 % |
| 2008 | 2,204.61 | -6.39 % |
| 2009 | 2,481.45 | 12.56 % |
| 2010 | 2,621.78 | 5.66 % |
| 2011 | 2,793.00 | 6.53 % |
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