|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 54.22 | NA |
| 1987 | 61.34 | 13.13 % |
| 1988 | 62.82 | 2.40 % |
| 1989 | 73.99 | 17.79 % |
| 1990 | 84.26 | 13.88 % |
| 1991 | 101.56 | 20.53 % |
| 1992 | 113.38 | 11.64 % |
| 1993 | 118.04 | 4.11 % |
| 1994 | 129.68 | 9.86 % |
| 1995 | 137.46 | 6.00 % |
| 1996 | 144.22 | 4.92 % |
| 1997 | 147.81 | 2.48 % |
| 1998 | 154.77 | 4.71 % |
| 1999 | 161.48 | 4.33 % |
| 2000 | 162.61 | 0.70 % |
| 2001 | 164.29 | 1.03 % |
| 2002 | 167.70 | 2.08 % |
| 2003 | 174.25 | 3.90 % |
| 2004 | 178.28 | 2.31 % |
| 2005 | 182.28 | 2.24 % |
| 2006 | 179.97 | -1.27 % |
| 2007 | 174.04 | -3.30 % |
| 2008 | 56.46 | -67.56 % |
| 2009 | 167.07 | 195.90 % |
| 2010 | 93.83 | -43.84 % |
|
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