|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | .37 | NA |
| 1988 | .61 | 64.27 % |
| 1989 | .27 | -55.95 % |
| 1990 | 1.09 | 302.28 % |
| 1991 | 1.18 | 8.04 % |
| 1992 | 6.20 | 427.03 % |
| 1993 | 6.80 | 9.81 % |
| 1994 | 6.46 | -5.12 % |
| 1995 | 6.82 | 5.71 % |
| 1996 | 6.86 | 0.56 % |
| 1997 | 6.92 | 0.83 % |
| 1998 | 6.96 | 0.54 % |
| 1999 | 6.96 | 0.00 % |
| 2000 | 7.01 | 0.82 % |
| 2001 | 6.77 | -3.50 % |
| 2002 | 6.44 | -4.85 % |
| 2003 | 6.77 | 5.10 % |
| 2004 | 6.46 | -4.57 % |
| 2005 | 6.71 | 3.95 % |
| 2006 | 1.97 | -70.65 % |
| 2007 | 2.04 | 3.70 % |
| 2008 | 2.39 | 16.96 % |
| 2009 | 2.15 | -9.92 % |
| 2010 | 2.15 | 0.00 % |
|
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