|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 161.54 | NA |
| 1993 | 158.05 | -2.17 % |
| 1994 | 117.48 | -25.67 % |
| 1995 | 120.14 | 2.27 % |
| 1996 | 103.09 | -14.20 % |
| 1997 | 98.05 | -4.88 % |
| 1998 | 95.39 | -2.72 % |
| 1999 | 99.73 | 4.55 % |
| 2000 | 77.90 | -21.89 % |
| 2001 | 150.84 | 93.64 % |
| 2002 | 100.13 | -33.62 % |
| 2003 | 104.11 | 3.97 % |
| 2004 | 103.99 | -0.11 % |
| 2005 | 106.17 | 2.10 % |
| 2006 | 125.36 | 18.08 % |
| 2007 | 120.87 | -3.58 % |
| 2008 | 125.35 | 3.70 % |
| 2009 | 89.61 | -28.51 % |
| 2010 | 103.39 | 15.37 % |
|
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