|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.58 | NA |
| 1987 | 1.58 | 0.04 % |
| 1988 | 1.65 | 4.41 % |
| 1989 | 2.84 | 71.76 % |
| 1990 | 2.88 | 1.64 % |
| 1991 | 2.04 | -29.35 % |
| 1992 | 2.26 | 10.97 % |
| 1993 | 4.15 | 83.64 % |
| 1994 | 4.01 | -3.44 % |
| 1995 | 4.03 | 0.56 % |
| 1996 | 4.00 | -0.68 % |
| 1997 | 4.02 | 0.29 % |
| 1998 | 4.02 | 0.01 % |
| 1999 | 4.02 | 0.00 % |
| 2000 | 4.03 | 0.24 % |
| 2001 | 4.04 | 0.29 % |
| 2002 | 4.08 | 0.97 % |
| 2003 | 4.40 | 7.88 % |
| 2004 | 4.57 | 3.98 % |
| 2005 | 4.67 | 2.13 % |
| 2006 | 4.64 | -0.63 % |
| 2007 | 4.45 | -4.07 % |
| 2008 | 4.59 | 3.20 % |
| 2009 | 6.44 | 40.08 % |
| 2010 | 6.45 | 0.28 % |
|
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