|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 5.73 | NA |
| 1993 | 6.46 | 12.87 % |
| 1994 | 3.41 | -47.20 % |
| 1995 | 3.09 | -9.54 % |
| 1996 | 3.03 | -1.91 % |
| 1997 | 2.93 | -3.16 % |
| 1998 | 3.33 | 13.64 % |
| 1999 | 1.53 | -54.01 % |
| 2000 | 1.04 | -32.18 % |
| 2001 | 4.70 | 352.20 % |
| 2002 | 1.35 | -71.30 % |
| 2003 | 1.47 | 9.09 % |
| 2004 | 1.59 | 8.04 % |
| 2005 | 1.72 | 7.99 % |
| 2006 | 2.00 | 16.67 % |
| 2007 | 2.23 | 11.22 % |
| 2008 | 4.17 | 87.16 % |
| 2009 | 4.39 | 5.39 % |
| 2010 | 4.50 | 2.33 % |
|
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