|
| year | consumption | change |
| 1980 | 24.00 | NA |
| 1981 | 26.40 | 10.00 % |
| 1982 | 26.00 | -1.52 % |
| 1983 | 26.60 | 2.31 % |
| 1984 | 27.00 | 1.50 % |
| 1985 | 27.88 | 3.27 % |
| 1986 | 28.62 | 2.64 % |
| 1987 | 34.63 | 21.00 % |
| 1988 | 40.12 | 15.86 % |
| 1989 | 46.40 | 15.65 % |
| 1990 | 53.00 | 14.22 % |
| 1991 | 55.75 | 5.19 % |
| 1992 | 60.98 | 9.40 % |
| 1993 | 77.37 | 26.87 % |
| 1994 | 84.98 | 9.83 % |
| 1995 | 94.31 | 10.98 % |
| 1996 | 115.76 | 22.75 % |
| 1997 | 128.77 | 11.24 % |
| 1998 | 135.45 | 5.19 % |
| 1999 | 158.84 | 17.27 % |
| 2000 | 175.71 | 10.62 % |
| 2001 | 178.57 | 1.63 % |
| 2002 | 192.90 | 8.03 % |
| 2003 | 214.62 | 11.26 % |
| 2004 | 238.37 | 11.07 % |
| 2005 | 244.59 | 2.61 % |
| 2006 | 250.73 | 2.51 % |
| 2007 | 277.22 | 10.56 % |
| 2008 | 292.78 | 5.62 % |
| 2009 | 293.99 | 0.41 % |
| 2010 | 320.36 | 8.97 % |
| 2011 | 352.00 | 9.88 % |
|
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