|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 6.57 | NA |
| 1987 | 6.65 | 1.29 % |
| 1988 | 3.42 | -48.55 % |
| 1989 | 3.64 | 6.46 % |
| 1990 | 2.43 | -33.21 % |
| 1991 | 1.33 | -45.43 % |
| 1992 | 1.05 | -20.92 % |
| 1993 | 1.28 | 22.24 % |
| 1994 | 1.62 | 26.42 % |
| 1995 | 1.57 | -3.35 % |
| 1996 | 1.35 | -13.79 % |
| 1997 | 1.25 | -7.81 % |
| 1998 | 1.25 | 0.27 % |
| 1999 | 1.29 | 3.39 % |
| 2000 | 1.48 | 14.44 % |
| 2001 | 1.06 | -28.38 % |
| 2002 | 1.25 | 18.00 % |
| 2003 | 1.25 | 0.00 % |
| 2004 | 1.58 | 26.77 % |
| 2005 | 1.91 | 20.33 % |
| 2006 | 3.11 | 63.33 % |
| 2007 | 3.83 | 23.11 % |
| 2008 | 1.78 | -53.59 % |
| 2009 | 1.65 | -7.14 % |
| 2010 | 1.46 | -11.54 % |
|
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