|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .13 | NA |
| 1987 | .16 | 25.12 % |
| 1988 | .13 | -20.08 % |
| 1989 | .19 | 49.61 % |
| 1990 | .19 | 0.32 % |
| 1991 | .25 | 33.26 % |
| 1992 | .25 | -0.18 % |
| 1993 | .25 | 0.18 % |
| 1994 | .22 | -12.60 % |
| 1995 | .25 | 14.41 % |
| 1996 | .25 | 0.00 % |
| 1997 | .25 | 0.09 % |
| 1998 | .25 | 0.00 % |
| 1999 | .22 | -12.50 % |
| 2000 | .29 | 28.57 % |
| 2001 | .35 | 22.22 % |
| 2002 | .41 | 18.18 % |
| 2003 | .41 | 0.00 % |
| 2004 | .44 | 7.69 % |
| 2005 | .38 | -14.29 % |
| 2006 | .44 | 16.67 % |
| 2007 | .57 | 28.57 % |
| 2008 | .51 | -11.11 % |
| 2009 | .54 | 6.25 % |
| 2010 | .51 | -5.88 % |
|
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