|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 133.26 | NA |
| 1987 | 129.60 | -2.75 % |
| 1988 | 129.52 | -0.06 % |
| 1989 | 81.83 | -36.82 % |
| 1990 | 64.38 | -21.33 % |
| 1991 | 47.92 | -25.56 % |
| 1992 | 43.07 | -10.12 % |
| 1993 | 38.06 | -11.64 % |
| 1994 | 45.93 | 20.68 % |
| 1995 | 41.01 | -10.71 % |
| 1996 | 25.27 | -38.38 % |
| 1997 | 29.11 | 15.18 % |
| 1998 | 25.41 | -12.70 % |
| 1999 | 21.98 | -13.49 % |
| 2000 | 36.28 | 65.06 % |
| 2001 | 29.19 | -19.56 % |
| 2002 | 16.31 | -44.13 % |
| 2003 | 8.66 | -46.92 % |
| 2004 | 10.49 | 21.17 % |
| 2005 | 12.98 | 23.74 % |
| 2006 | 7.91 | -39.06 % |
| 2007 | 8.73 | 10.33 % |
| 2008 | 5.93 | -32.04 % |
| 2009 | 10.33 | 74.12 % |
| 2010 | 4.61 | -55.40 % |
|
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