|
| year | consumption | change |
| 1980 | 217.00 | NA |
| 1981 | 214.00 | -1.38 % |
| 1982 | 205.00 | -4.21 % |
| 1983 | 250.00 | 21.95 % |
| 1984 | 240.00 | -4.00 % |
| 1985 | 258.31 | 7.63 % |
| 1986 | 279.22 | 8.09 % |
| 1987 | 285.03 | 2.08 % |
| 1988 | 319.72 | 12.17 % |
| 1989 | 349.97 | 9.46 % |
| 1990 | 400.00 | 14.30 % |
| 1991 | 262.80 | -34.30 % |
| 1992 | 341.44 | 29.92 % |
| 1993 | 409.13 | 19.82 % |
| 1994 | 456.60 | 11.60 % |
| 1995 | 474.13 | 3.84 % |
| 1996 | 469.46 | -0.98 % |
| 1997 | 443.35 | -5.56 % |
| 1998 | 447.36 | 0.90 % |
| 1999 | 451.29 | 0.88 % |
| 2000 | 462.32 | 2.44 % |
| 2001 | 489.08 | 5.79 % |
| 2002 | 497.37 | 1.70 % |
| 2003 | 457.38 | -8.04 % |
| 2004 | 502.66 | 9.90 % |
| 2005 | 541.03 | 7.63 % |
| 2006 | 532.99 | -1.49 % |
| 2007 | 570.81 | 7.09 % |
| 2008 | 584.99 | 2.48 % |
| 2009 | 643.45 | 9.99 % |
| 2010 | 662.04 | 2.89 % |
| 2011 | 818.00 | 23.56 % |
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