|
| year | consumption | change |
| 1980 | 12.71 | NA |
| 1981 | 13.95 | 9.76 % |
| 1982 | 18.00 | 29.03 % |
| 1983 | 20.00 | 11.11 % |
| 1984 | 35.00 | 75.00 % |
| 1985 | 42.00 | 20.00 % |
| 1986 | 39.00 | -7.14 % |
| 1987 | 45.18 | 15.86 % |
| 1988 | 39.20 | -13.24 % |
| 1989 | 55.45 | 41.45 % |
| 1990 | 54.00 | -2.61 % |
| 1991 | 41.00 | -24.07 % |
| 1992 | 31.00 | -24.39 % |
| 1993 | 52.97 | 70.87 % |
| 1994 | 68.86 | 30.00 % |
| 1995 | 57.56 | -16.41 % |
| 1996 | 66.75 | 15.96 % |
| 1997 | 90.76 | 35.98 % |
| 1998 | 103.83 | 14.40 % |
| 1999 | 105.95 | 2.04 % |
| 2000 | 108.77 | 2.67 % |
| 2001 | 135.26 | 24.35 % |
| 2002 | 135.61 | 0.26 % |
| 2003 | 130.31 | -3.91 % |
| 2004 | 130.67 | 0.27 % |
| 2005 | 151.85 | 16.22 % |
| 2006 | 134.20 | -11.63 % |
| 2007 | 99.94 | -25.53 % |
| 2008 | 110.18 | 10.25 % |
| 2009 | 108.06 | -1.92 % |
| 2010 | 115.83 | 7.19 % |
| 2011 | 131.02 | 13.11 % |
|
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