|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 57.36 | NA |
| 1987 | 62.30 | 8.60 % |
| 1988 | 68.24 | 9.55 % |
| 1989 | 74.09 | 8.56 % |
| 1990 | 80.18 | 8.23 % |
| 1991 | 81.08 | 1.12 % |
| 1992 | 85.05 | 4.89 % |
| 1993 | 90.36 | 6.24 % |
| 1994 | 89.84 | -0.58 % |
| 1995 | 111.08 | 23.64 % |
| 1996 | 110.96 | -0.11 % |
| 1997 | 91.73 | -17.33 % |
| 1998 | 92.95 | 1.33 % |
| 1999 | 102.16 | 9.90 % |
| 2000 | 111.48 | 9.13 % |
| 2001 | 107.71 | -3.39 % |
| 2002 | 106.53 | -1.10 % |
| 2003 | 107.11 | 0.55 % |
| 2004 | 114.34 | 6.75 % |
| 2005 | 111.37 | -2.60 % |
| 2006 | 115.50 | 3.71 % |
| 2007 | 108.94 | -5.68 % |
| 2008 | 102.68 | -5.74 % |
| 2009 | 94.67 | -7.80 % |
| 2010 | 65.79 | -30.51 % |
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