|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 8.45 | NA |
| 1993 | 9.53 | 12.81 % |
| 1994 | 14.08 | 47.78 % |
| 1995 | 9.53 | -32.33 % |
| 1996 | 3.29 | -65.43 % |
| 1997 | 1.31 | -60.15 % |
| 1998 | 2.12 | 61.29 % |
| 1999 | 2.31 | 9.00 % |
| 2000 | 2.28 | -1.19 % |
| 2001 | 2.27 | -0.65 % |
| 2002 | 2.20 | -2.80 % |
| 2003 | 2.48 | 12.50 % |
| 2004 | 2.32 | -6.24 % |
| 2005 | 1.93 | -17.05 % |
| 2006 | 3.92 | 103.30 % |
| 2007 | 4.07 | 3.78 % |
| 2008 | 1.57 | -61.46 % |
| 2009 | 1.50 | -4.05 % |
| 2010 | 1.16 | -22.54 % |
|
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