|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.53 | NA |
| 1987 | 1.64 | 6.85 % |
| 1988 | 1.77 | 8.14 % |
| 1989 | 1.76 | -0.80 % |
| 1990 | 1.70 | -3.13 % |
| 1991 | 2.34 | 37.09 % |
| 1992 | 2.66 | 13.85 % |
| 1993 | 2.82 | 6.05 % |
| 1994 | 3.21 | 13.77 % |
| 1995 | 3.43 | 7.01 % |
| 1996 | 4.04 | 17.54 % |
| 1997 | 4.39 | 8.88 % |
| 1998 | 5.54 | 26.05 % |
| 1999 | 5.66 | 2.21 % |
| 2000 | 5.65 | -0.27 % |
| 2001 | 4.86 | -13.84 % |
| 2002 | 5.18 | 6.48 % |
| 2003 | 4.91 | -5.29 % |
| 2004 | 5.05 | 3.05 % |
| 2005 | 5.23 | 3.51 % |
| 2006 | 5.46 | 4.30 % |
| 2007 | 5.54 | 1.50 % |
| 2008 | 5.76 | 4.06 % |
| 2009 | 10.28 | 78.37 % |
| 2010 | 11.04 | 7.36 % |
|
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