|
| year | consumption | change |
| 1980 | 260.00 | NA |
| 1981 | 300.00 | 15.38 % |
| 1982 | 320.00 | 6.67 % |
| 1983 | 376.00 | 17.50 % |
| 1984 | 406.00 | 7.98 % |
| 1985 | 430.00 | 5.91 % |
| 1986 | 427.57 | -0.57 % |
| 1987 | 441.86 | 3.34 % |
| 1988 | 436.90 | -1.12 % |
| 1989 | 442.51 | 1.29 % |
| 1990 | 465.04 | 5.09 % |
| 1991 | 456.49 | -1.84 % |
| 1992 | 443.82 | -2.78 % |
| 1993 | 450.02 | 1.40 % |
| 1994 | 447.98 | -0.45 % |
| 1995 | 458.49 | 2.35 % |
| 1996 | 501.10 | 9.29 % |
| 1997 | 531.43 | 6.05 % |
| 1998 | 554.88 | 4.41 % |
| 1999 | 563.87 | 1.62 % |
| 2000 | 552.80 | -1.96 % |
| 2001 | 544.67 | -1.47 % |
| 2002 | 564.70 | 3.68 % |
| 2003 | 561.11 | -0.64 % |
| 2004 | 603.92 | 7.63 % |
| 2005 | 625.24 | 3.53 % |
| 2006 | 658.44 | 5.31 % |
| 2007 | 693.53 | 5.33 % |
| 2008 | 700.72 | 1.04 % |
| 2009 | 720.71 | 2.85 % |
| 2010 | 737.62 | 2.35 % |
| 2011 | 697.00 | -5.51 % |
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