|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | 1.94 | NA |
| 1988 | 3.59 | 85.23 % |
| 1989 | 5.18 | 44.04 % |
| 1990 | 3.85 | -25.62 % |
| 1991 | 5.79 | 50.39 % |
| 1992 | 5.89 | 1.76 % |
| 1993 | 10.76 | 82.69 % |
| 1994 | 18.54 | 72.30 % |
| 1995 | 21.65 | 16.76 % |
| 1996 | 23.42 | 8.18 % |
| 1997 | 24.47 | 4.46 % |
| 1998 | 25.51 | 4.26 % |
| 1999 | 52.05 | 104.08 % |
| 2000 | 30.33 | -41.74 % |
| 2001 | 22.00 | -27.46 % |
| 2002 | 27.11 | 23.22 % |
| 2003 | 26.45 | -2.43 % |
| 2004 | 23.73 | -10.29 % |
| 2005 | 23.38 | -1.46 % |
| 2006 | 31.17 | 33.31 % |
| 2007 | 28.87 | -7.39 % |
| 2008 | 22.72 | -21.30 % |
| 2009 | 42.99 | 89.20 % |
| 2010 | 37.24 | -13.37 % |
|
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