|
| year | consumption | change |
| 1980 | 505.00 | NA |
| 1981 | 450.00 | -10.89 % |
| 1982 | 381.00 | -15.33 % |
| 1983 | 431.00 | 13.12 % |
| 1984 | 438.00 | 1.62 % |
| 1985 | 457.00 | 4.34 % |
| 1986 | 484.00 | 5.91 % |
| 1987 | 494.30 | 2.13 % |
| 1988 | 503.29 | 1.82 % |
| 1989 | 505.00 | 0.34 % |
| 1990 | 494.37 | -2.10 % |
| 1991 | 511.30 | 3.42 % |
| 1992 | 516.77 | 1.07 % |
| 1993 | 540.95 | 4.68 % |
| 1994 | 569.94 | 5.36 % |
| 1995 | 581.52 | 2.03 % |
| 1996 | 646.02 | 11.09 % |
| 1997 | 697.33 | 7.94 % |
| 1998 | 724.72 | 3.93 % |
| 1999 | 782.37 | 7.96 % |
| 2000 | 902.37 | 15.34 % |
| 2001 | 974.23 | 7.96 % |
| 2002 | 1,061.29 | 8.94 % |
| 2003 | 1,143.43 | 7.74 % |
| 2004 | 1,350.30 | 18.09 % |
| 2005 | 1,654.51 | 22.53 % |
| 2006 | 1,993.46 | 20.49 % |
| 2007 | 2,490.06 | 24.91 % |
| 2008 | 2,725.58 | 9.46 % |
| 2009 | 3,125.27 | 14.66 % |
| 2010 | 3,768.46 | 20.58 % |
| 2011 | 4,623.55 | 22.69 % |
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