|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 31.00 | NA |
| 1987 | 34.10 | 10.00 % |
| 1988 | 37.88 | 11.09 % |
| 1989 | 31.08 | -17.96 % |
| 1990 | 33.00 | 6.18 % |
| 1991 | 37.12 | 12.48 % |
| 1992 | 32.23 | -13.17 % |
| 1993 | 35.72 | 10.83 % |
| 1994 | 34.74 | -2.74 % |
| 1995 | 37.30 | 7.36 % |
| 1996 | 37.11 | -0.51 % |
| 1997 | 22.30 | -39.90 % |
| 1998 | 21.58 | -3.23 % |
| 1999 | 20.16 | -6.58 % |
| 2000 | 26.89 | 33.35 % |
| 2001 | 35.39 | 31.62 % |
| 2002 | 33.19 | -6.22 % |
| 2003 | 23.63 | -28.78 % |
| 2004 | 19.94 | -15.64 % |
| 2005 | 28.12 | 41.06 % |
| 2006 | 36.53 | 29.89 % |
| 2007 | 36.60 | 0.17 % |
| 2008 | 16.86 | -53.94 % |
| 2009 | 12.14 | -28.02 % |
| 2010 | 44.39 | 265.79 % |
|
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