|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | 2.22 | NA |
| 1983 | 2.12 | -4.76 % |
| 1984 | 2.33 | 10.00 % |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | | NA |
| 1993 | 2.87 | NA |
| 1994 | 1.34 | -53.24 % |
| 1995 | 1.23 | -8.21 % |
| 1996 | 1.48 | 20.59 % |
| 1997 | 6.82 | 359.52 % |
| 1998 | 30.41 | 346.11 % |
| 1999 | 52.97 | 74.22 % |
| 2000 | 72.47 | 36.80 % |
| 2001 | 71.37 | -1.51 % |
| 2002 | 76.63 | 7.37 % |
| 2003 | 86.17 | 12.44 % |
| 2004 | 94.79 | 10.00 % |
| 2005 | 100.37 | 5.89 % |
| 2006 | 116.96 | 16.54 % |
| 2007 | 142.32 | 21.68 % |
| 2008 | 148.61 | 4.42 % |
| 2009 | 124.59 | -16.16 % |
| 2010 | 135.96 | 9.13 % |
| 2011 | 167.29 | 23.04 % |
|
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