|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.28 | NA |
| 1987 | 3.10 | -5.52 % |
| 1988 | 4.39 | 41.45 % |
| 1989 | 6.29 | 43.44 % |
| 1990 | 6.69 | 6.35 % |
| 1991 | 5.50 | -17.73 % |
| 1992 | 6.14 | 11.53 % |
| 1993 | 6.48 | 5.49 % |
| 1994 | 9.01 | 39.08 % |
| 1995 | 9.57 | 6.30 % |
| 1996 | 10.78 | 12.63 % |
| 1997 | 9.61 | -10.84 % |
| 1998 | 10.76 | 11.87 % |
| 1999 | 11.67 | 8.53 % |
| 2000 | 6.06 | -48.11 % |
| 2001 | 6.76 | 11.65 % |
| 2002 | 8.49 | 25.48 % |
| 2003 | 10.75 | 26.72 % |
| 2004 | 10.74 | -0.09 % |
| 2005 | 11.18 | 4.07 % |
| 2006 | 15.64 | 39.86 % |
| 2007 | 18.01 | 15.13 % |
| 2008 | 12.39 | -31.21 % |
| 2009 | 10.37 | -16.30 % |
| 2010 | 10.53 | 1.58 % |
|
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