|
| year | consumption | change |
| 1984 | 115.26 | NA |
| 1985 | 113.88 | -1.20 % |
| 1986 | 98.25 | -13.72 % |
| 1987 | 94.56 | -3.76 % |
| 1988 | 96.17 | 1.71 % |
| 1989 | 84.25 | -12.39 % |
| 1990 | 42.53 | -49.52 % |
| 1991 | 46.30 | 8.85 % |
| 1992 | 41.40 | -10.57 % |
| 1993 | 49.63 | 19.87 % |
| 1994 | 48.95 | -1.37 % |
| 1995 | 54.04 | 10.41 % |
| 1996 | 61.73 | 14.24 % |
| 1997 | 65.88 | 6.71 % |
| 1998 | 78.05 | 18.48 % |
| 1999 | 72.94 | -6.56 % |
| 2000 | 67.40 | -7.60 % |
| 2001 | 72.34 | 7.33 % |
| 2002 | 43.33 | -40.09 % |
| 2003 | 54.63 | 26.07 % |
| 2004 | 64.32 | 17.73 % |
| 2005 | 69.81 | 8.54 % |
| 2006 | 53.68 | -23.10 % |
| 2007 | 32.14 | -40.13 % |
| 2008 | 14.23 | -55.73 % |
| 2009 | 17.55 | 23.32 % |
| 2010 | 19.93 | 13.57 % |
|
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