|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 6.39 | NA |
| 1987 | 6.39 | 0.00 % |
| 1988 | 6.37 | -0.27 % |
| 1989 | .99 | -84.53 % |
| 1990 | .91 | -7.41 % |
| 1991 | .88 | -4.00 % |
| 1992 | .82 | -6.51 % |
| 1993 | .80 | -1.96 % |
| 1994 | .82 | 2.27 % |
| 1995 | 1.00 | 22.22 % |
| 1996 | 1.04 | 3.35 % |
| 1997 | .64 | -38.43 % |
| 1998 | .58 | -8.57 % |
| 1999 | .58 | 0.00 % |
| 2000 | .42 | -28.32 % |
| 2001 | .27 | -34.60 % |
| 2002 | .33 | 20.00 % |
| 2003 | .18 | -44.44 % |
| 2004 | .20 | 9.69 % |
| 2005 | .24 | 18.51 % |
| 2006 | .07 | -69.23 % |
| 2007 | .15 | 99.99 % |
| 2008 | .13 | -12.50 % |
| 2009 | .09 | -28.58 % |
| 2010 | .09 | 0.00 % |
|
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