|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | | NA |
| 1993 | 37.47 | NA |
| 1994 | 31.76 | -15.24 % |
| 1995 | 22.85 | -28.05 % |
| 1996 | 24.83 | 8.63 % |
| 1997 | 23.07 | -7.08 % |
| 1998 | 24.57 | 6.52 % |
| 1999 | 21.52 | -12.42 % |
| 2000 | 16.19 | -24.76 % |
| 2001 | 16.17 | -0.13 % |
| 2002 | 9.41 | -41.78 % |
| 2003 | 9.19 | -2.33 % |
| 2004 | 9.78 | 6.38 % |
| 2005 | 9.54 | -2.44 % |
| 2006 | 7.56 | -20.76 % |
| 2007 | 7.17 | -5.22 % |
| 2008 | 6.13 | -14.53 % |
| 2009 | 5.58 | -8.85 % |
| 2010 | 4.18 | -25.07 % |
|
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