|
| year | consumption | change |
| 1980 | 499.00 | NA |
| 1981 | 483.00 | -3.21 % |
| 1982 | 468.00 | -3.11 % |
| 1983 | 477.00 | 1.92 % |
| 1984 | 463.00 | -2.94 % |
| 1985 | 415.10 | -10.35 % |
| 1986 | 448.37 | 8.02 % |
| 1987 | 479.42 | 6.93 % |
| 1988 | 475.00 | -0.92 % |
| 1989 | 433.78 | -8.68 % |
| 1990 | 413.00 | -4.79 % |
| 1991 | 423.68 | 2.59 % |
| 1992 | 445.19 | 5.08 % |
| 1993 | 467.69 | 5.06 % |
| 1994 | 458.23 | -2.02 % |
| 1995 | 453.40 | -1.05 % |
| 1996 | 478.55 | 5.55 % |
| 1997 | 476.26 | -0.48 % |
| 1998 | 491.57 | 3.21 % |
| 1999 | 523.20 | 6.44 % |
| 2000 | 510.93 | -2.35 % |
| 2001 | 474.39 | -7.15 % |
| 2002 | 438.30 | -7.61 % |
| 2003 | 449.99 | 2.67 % |
| 2004 | 471.79 | 4.84 % |
| 2005 | 483.01 | 2.38 % |
| 2006 | 535.42 | 10.85 % |
| 2007 | 586.97 | 9.63 % |
| 2008 | 581.88 | -0.87 % |
| 2009 | 588.62 | 1.16 % |
| 2010 | 620.26 | 5.37 % |
| 2011 | 685.00 | 10.44 % |
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