|
| year | consumption | change |
| 1984 | 80.85 | NA |
| 1985 | 63.82 | -21.07 % |
| 1986 | 65.61 | 2.82 % |
| 1987 | 58.66 | -10.60 % |
| 1988 | 52.15 | -11.10 % |
| 1989 | 87.61 | 68.00 % |
| 1990 | 79.12 | -9.69 % |
| 1991 | 79.13 | 0.01 % |
| 1992 | 91.22 | 15.28 % |
| 1993 | 74.54 | -18.28 % |
| 1994 | 65.67 | -11.90 % |
| 1995 | 82.26 | 25.26 % |
| 1996 | 62.53 | -23.98 % |
| 1997 | 64.92 | 3.81 % |
| 1998 | 80.78 | 24.44 % |
| 1999 | 80.42 | -0.44 % |
| 2000 | 68.89 | -14.34 % |
| 2001 | 66.96 | -2.80 % |
| 2002 | 73.36 | 9.56 % |
| 2003 | 53.61 | -26.92 % |
| 2004 | 55.22 | 2.99 % |
| 2005 | 63.74 | 15.44 % |
| 2006 | 42.60 | -33.17 % |
| 2007 | 41.69 | -2.14 % |
| 2008 | 40.72 | -2.31 % |
| 2009 | 33.51 | -17.72 % |
| 2010 | 29.30 | -12.56 % |
|
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