|
| year | consumption | change |
| 1980 | 590.00 | NA |
| 1981 | 580.00 | -1.69 % |
| 1982 | 660.00 | 13.79 % |
| 1983 | 785.00 | 18.94 % |
| 1984 | 765.00 | -2.55 % |
| 1985 | 790.00 | 3.27 % |
| 1986 | 830.00 | 5.06 % |
| 1987 | 865.00 | 4.22 % |
| 1988 | 870.00 | 0.58 % |
| 1989 | 964.99 | 10.92 % |
| 1990 | 1,002.50 | 3.89 % |
| 1991 | 1,074.86 | 7.22 % |
| 1992 | 1,082.64 | 0.72 % |
| 1993 | 1,107.87 | 2.33 % |
| 1994 | 1,129.53 | 1.95 % |
| 1995 | 1,140.18 | 0.94 % |
| 1996 | 1,118.67 | -1.89 % |
| 1997 | 1,221.69 | 9.21 % |
| 1998 | 1,217.48 | -0.34 % |
| 1999 | 1,205.00 | -1.02 % |
| 2000 | 1,248.32 | 3.59 % |
| 2001 | 1,285.32 | 2.96 % |
| 2002 | 1,350.35 | 5.06 % |
| 2003 | 1,425.65 | 5.58 % |
| 2004 | 1,488.53 | 4.41 % |
| 2005 | 1,556.44 | 4.56 % |
| 2006 | 1,642.92 | 5.56 % |
| 2007 | 1,655.70 | 0.78 % |
| 2008 | 1,741.86 | 5.20 % |
| 2009 | 1,765.92 | 1.38 % |
| 2010 | 1,726.44 | -2.24 % |
| 2011 | 2,028.00 | 17.47 % |
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