|
| year | consumption | change |
| 1980 | 344.43 | NA |
| 1981 | 349.80 | 1.56 % |
| 1982 | 367.88 | 5.17 % |
| 1983 | 367.03 | -0.23 % |
| 1984 | 382.32 | 4.17 % |
| 1985 | 394.96 | 3.31 % |
| 1986 | 417.32 | 5.66 % |
| 1987 | 416.86 | -0.11 % |
| 1988 | 410.82 | -1.45 % |
| 1989 | 417.78 | 1.69 % |
| 1990 | 394.00 | -5.69 % |
| 1991 | 393.00 | -0.25 % |
| 1992 | 348.56 | -11.31 % |
| 1993 | 372.33 | 6.82 % |
| 1994 | 375.36 | 0.82 % |
| 1995 | 406.69 | 8.35 % |
| 1996 | 452.99 | 11.38 % |
| 1997 | 430.84 | -4.89 % |
| 1998 | 433.14 | 0.53 % |
| 1999 | 436.67 | 0.82 % |
| 2000 | 424.98 | -2.68 % |
| 2001 | 472.13 | 11.09 % |
| 2002 | 472.97 | 0.18 % |
| 2003 | 514.75 | 8.83 % |
| 2004 | 510.37 | -0.85 % |
| 2005 | 529.12 | 3.67 % |
| 2006 | 501.54 | -5.21 % |
| 2007 | 468.49 | -6.59 % |
| 2008 | 462.73 | -1.23 % |
| 2009 | 400.19 | -13.52 % |
| 2010 | 428.44 | 7.06 % |
| 2011 | 408.14 | -4.74 % |
|
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