|
| year | consumption | change |
| 1980 | 19.84 | NA |
| 1981 | 99.21 | 400.00 % |
| 1982 | 36.38 | -63.33 % |
| 1983 | 101.41 | 178.79 % |
| 1984 | 131.18 | 29.35 % |
| 1985 | 95.90 | -26.89 % |
| 1986 | 94.80 | -1.15 % |
| 1987 | 101.41 | 6.98 % |
| 1988 | 125.66 | 23.91 % |
| 1989 | 145.51 | 15.79 % |
| 1990 | 167.55 | 15.15 % |
| 1991 | 146.61 | -12.50 % |
| 1992 | 175.27 | 19.55 % |
| 1993 | 145.51 | -16.98 % |
| 1994 | 136.69 | -6.06 % |
| 1995 | 106.92 | -21.77 % |
| 1996 | 98.11 | -8.25 % |
| 1997 | 101.41 | 3.37 % |
| 1998 | 81.57 | -19.57 % |
| 1999 | 79.37 | -2.70 % |
| 2000 | 72.75 | -8.33 % |
| 2001 | 72.75 | 0.00 % |
| 2002 | 109.13 | 50.00 % |
| 2003 | 101.41 | -7.07 % |
| 2004 | 119.05 | 17.39 % |
| 2005 | 98.11 | -17.59 % |
| 2006 | 132.28 | 34.83 % |
| 2007 | 121.25 | -8.33 % |
| 2008 | 120.15 | -0.91 % |
| 2009 | 104.72 | -12.84 % |
| 2010 | 110.23 | 5.26 % |
| 2011 | 106.92 | -3.00 % |
|
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