|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.66 | NA |
| 1987 | 1.39 | -16.52 % |
| 1988 | 1.38 | -0.58 % |
| 1989 | 3.53 | 155.81 % |
| 1990 | 4.30 | 21.81 % |
| 1991 | 4.69 | 8.98 % |
| 1992 | 5.20 | 10.95 % |
| 1993 | 2.91 | -44.12 % |
| 1994 | 3.29 | 13.22 % |
| 1995 | 3.14 | -4.42 % |
| 1996 | 2.77 | -11.83 % |
| 1997 | 3.33 | 19.98 % |
| 1998 | 3.44 | 3.36 % |
| 1999 | 1.38 | -59.92 % |
| 2000 | 1.54 | 11.89 % |
| 2001 | 1.54 | 0.09 % |
| 2002 | 1.54 | 0.11 % |
| 2003 | 1.54 | -0.61 % |
| 2004 | 1.71 | 11.42 % |
| 2005 | 1.50 | -12.34 % |
| 2006 | 2.67 | 77.71 % |
| 2007 | 3.17 | 19.12 % |
| 2008 | 2.23 | -29.89 % |
| 2009 | 3.13 | 40.47 % |
| 2010 | 6.43 | 105.55 % |
|
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