|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 65.61 | NA |
| 1987 | 79.06 | 20.50 % |
| 1988 | 86.25 | 9.09 % |
| 1989 | 92.04 | 6.71 % |
| 1990 | 91.30 | -0.80 % |
| 1991 | 88.03 | -3.59 % |
| 1992 | 91.35 | 3.78 % |
| 1993 | 112.41 | 23.05 % |
| 1994 | 120.96 | 7.61 % |
| 1995 | 125.93 | 4.11 % |
| 1996 | 138.38 | 9.89 % |
| 1997 | 136.13 | -1.63 % |
| 1998 | 133.38 | -2.02 % |
| 1999 | 140.13 | 5.06 % |
| 2000 | 148.16 | 5.73 % |
| 2001 | 147.20 | -0.65 % |
| 2002 | 147.85 | 0.44 % |
| 2003 | 152.41 | 3.08 % |
| 2004 | 158.76 | 4.17 % |
| 2005 | 152.74 | -3.79 % |
| 2006 | 147.91 | -3.16 % |
| 2007 | 164.59 | 11.28 % |
| 2008 | 159.52 | -3.08 % |
| 2009 | 150.69 | -5.53 % |
| 2010 | 136.45 | -9.45 % |
|
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