|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 16.49 | NA |
| 1987 | 15.90 | -3.60 % |
| 1988 | 21.54 | 35.46 % |
| 1989 | 28.99 | 34.60 % |
| 1990 | 30.00 | 3.48 % |
| 1991 | 9.87 | -67.11 % |
| 1992 | 11.59 | 17.50 % |
| 1993 | 17.45 | 50.49 % |
| 1994 | 6.08 | -65.13 % |
| 1995 | 19.77 | 225.01 % |
| 1996 | 17.14 | -13.30 % |
| 1997 | 37.47 | 118.60 % |
| 1998 | 30.82 | -17.75 % |
| 1999 | 29.22 | -5.18 % |
| 2000 | 21.67 | -25.83 % |
| 2001 | 40.62 | 87.43 % |
| 2002 | 24.76 | -39.05 % |
| 2003 | 25.29 | 2.15 % |
| 2004 | 20.95 | -17.17 % |
| 2005 | 29.47 | 40.66 % |
| 2006 | 50.28 | 70.61 % |
| 2007 | 48.15 | -4.24 % |
| 2008 | 48.62 | 0.99 % |
| 2009 | 19.27 | -60.37 % |
| 2010 | 47.57 | 146.86 % |
|
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