|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .68 | NA |
| 1987 | .20 | -70.38 % |
| 1988 | .22 | 9.18 % |
| 1989 | .29 | 34.61 % |
| 1990 | .26 | -13.09 % |
| 1991 | .33 | 28.57 % |
| 1992 | .33 | -0.27 % |
| 1993 | .36 | 11.42 % |
| 1994 | .38 | 5.00 % |
| 1995 | .38 | 0.00 % |
| 1996 | .38 | -0.27 % |
| 1997 | .38 | 0.27 % |
| 1998 | .62 | 61.91 % |
| 1999 | .62 | 0.00 % |
| 2000 | .66 | 5.59 % |
| 2001 | .62 | -5.30 % |
| 2002 | .73 | 17.65 % |
| 2003 | .82 | 12.12 % |
| 2004 | .80 | -2.16 % |
| 2005 | .84 | 4.83 % |
| 2006 | .66 | -21.74 % |
| 2007 | .71 | 8.33 % |
| 2008 | .51 | -28.21 % |
| 2009 | .50 | -2.50 % |
| 2010 | .50 | 0.00 % |
|
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