|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .14 | NA |
| 1987 | .25 | 82.51 % |
| 1988 | .25 | 1.98 % |
| 1989 | .39 | 54.54 % |
| 1990 | .16 | -59.67 % |
| 1991 | .16 | 0.00 % |
| 1992 | .18 | 11.76 % |
| 1993 | .19 | 7.37 % |
| 1994 | .16 | -16.67 % |
| 1995 | .19 | 20.69 % |
| 1996 | .21 | 6.89 % |
| 1997 | .21 | 0.00 % |
| 1998 | .22 | 8.52 % |
| 1999 | .38 | 71.43 % |
| 2000 | .38 | 0.15 % |
| 2001 | .38 | 0.27 % |
| 2002 | .38 | -0.42 % |
| 2003 | .41 | 8.33 % |
| 2004 | .41 | -0.27 % |
| 2005 | .41 | 0.27 % |
| 2006 | .41 | 0.00 % |
| 2007 | .32 | -23.08 % |
| 2008 | .32 | 0.00 % |
| 2009 | .38 | 20.00 % |
| 2010 | .10 | -75.00 % |
|
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