|
| 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 | 15,933.91 | NA |
| 1994 | 13,710.55 | -13.95 % |
| 1995 | 13,948.65 | 1.74 % |
| 1996 | 13,561.74 | -2.77 % |
| 1997 | 12,383.37 | -8.69 % |
| 1998 | 11,529.07 | -6.90 % |
| 1999 | 10,876.51 | -5.66 % |
| 2000 | 9,896.55 | -9.01 % |
| 2001 | 10,122.53 | 2.28 % |
| 2002 | 9,693.73 | -4.24 % |
| 2003 | 10,227.25 | 5.50 % |
| 2004 | 9,845.85 | -3.73 % |
| 2005 | 9,290.28 | -5.64 % |
| 2006 | 9,555.94 | 2.86 % |
| 2007 | 8,824.00 | -7.66 % |
| 2008 | 8,992.66 | 1.91 % |
| 2009 | 8,567.16 | -4.73 % |
| 2010 | 8,415.05 | -1.78 % |
| 2011 | 8,288.28 | -1.51 % |
|
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