|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | 13.63 | NA |
| 1991 | 14.70 | 7.85 % |
| 1992 | 16.48 | 12.13 % |
| 1993 | 17.38 | 5.44 % |
| 1994 | 18.76 | 7.96 % |
| 1995 | 19.89 | 6.01 % |
| 1996 | 65.83 | 230.95 % |
| 1997 | 103.96 | 57.93 % |
| 1998 | 96.89 | -6.81 % |
| 1999 | 106.96 | 10.39 % |
| 2000 | 95.28 | -10.92 % |
| 2001 | 96.16 | 0.92 % |
| 2002 | 91.40 | -4.95 % |
| 2003 | 67.88 | -25.73 % |
| 2004 | 89.14 | 31.32 % |
| 2005 | 108.42 | 21.63 % |
| 2006 | 105.90 | -2.33 % |
| 2007 | 95.00 | -10.29 % |
| 2008 | 118.66 | 24.91 % |
| 2009 | 113.26 | -4.55 % |
| 2010 | 141.97 | 25.35 % |
| 2011 | 112.83 | -20.52 % |
|
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