|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | | NA |
| 1993 | 258.82 | NA |
| 1994 | 238.38 | -7.90 % |
| 1995 | 284.99 | 19.55 % |
| 1996 | 328.11 | 15.13 % |
| 1997 | 332.88 | 1.45 % |
| 1998 | 332.70 | -0.05 % |
| 1999 | 336.13 | 1.03 % |
| 2000 | 326.17 | -2.96 % |
| 2001 | 349.44 | 7.14 % |
| 2002 | 337.33 | -3.47 % |
| 2003 | 341.07 | 1.11 % |
| 2004 | 339.06 | -0.59 % |
| 2005 | 335.25 | -1.12 % |
| 2006 | 328.15 | -2.12 % |
| 2007 | 305.51 | -6.90 % |
| 2008 | 306.78 | 0.42 % |
| 2009 | 289.02 | -5.79 % |
| 2010 | 327.72 | 13.39 % |
| 2011 | 315.86 | -3.62 % |
|
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