|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 39.03 | NA |
| 1987 | 41.08 | 5.24 % |
| 1988 | 40.46 | -1.50 % |
| 1989 | 45.78 | 13.14 % |
| 1990 | 53.97 | 17.91 % |
| 1991 | 61.51 | 13.97 % |
| 1992 | 61.70 | 0.31 % |
| 1993 | 79.60 | 29.01 % |
| 1994 | 95.64 | 20.15 % |
| 1995 | 104.52 | 9.29 % |
| 1996 | 122.98 | 17.66 % |
| 1997 | 128.68 | 4.64 % |
| 1998 | 144.35 | 12.18 % |
| 1999 | 138.55 | -4.02 % |
| 2000 | 148.10 | 6.89 % |
| 2001 | 146.60 | -1.01 % |
| 2002 | 135.68 | -7.45 % |
| 2003 | 73.08 | -46.14 % |
| 2004 | 83.49 | 14.24 % |
| 2005 | 91.01 | 9.02 % |
| 2006 | 123.38 | 35.57 % |
| 2007 | 136.56 | 10.68 % |
| 2008 | 141.09 | 3.32 % |
| 2009 | 147.51 | 4.55 % |
| 2010 | 156.45 | 6.06 % |
|
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