|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 10.37 | NA |
| 1987 | 10.19 | -1.78 % |
| 1988 | 10.44 | 2.46 % |
| 1989 | 10.47 | 0.32 % |
| 1990 | 9.75 | -6.94 % |
| 1991 | 10.66 | 9.37 % |
| 1992 | 10.36 | -2.81 % |
| 1993 | 10.48 | 1.14 % |
| 1994 | 10.47 | -0.05 % |
| 1995 | 12.14 | 15.88 % |
| 1996 | 10.27 | -15.41 % |
| 1997 | 11.52 | 12.20 % |
| 1998 | 2.44 | -78.84 % |
| 1999 | 2.20 | -9.67 % |
| 2000 | 2.41 | 9.55 % |
| 2001 | 2.73 | 13.07 % |
| 2002 | 2.80 | 2.65 % |
| 2003 | 2.94 | 4.94 % |
| 2004 | 3.42 | 16.34 % |
| 2005 | 3.53 | 3.19 % |
| 2006 | 1.63 | -53.79 % |
| 2007 | 2.46 | 51.19 % |
| 2008 | 2.28 | -7.41 % |
| 2009 | 9.00 | 294.70 % |
| 2010 | 11.00 | 22.21 % |
|
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