|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .13 | NA |
| 1987 | .13 | 0.00 % |
| 1988 | .16 | 28.58 % |
| 1989 | .24 | 44.34 % |
| 1990 | .20 | -15.32 % |
| 1991 | .22 | 9.07 % |
| 1992 | .24 | 8.27 % |
| 1993 | .26 | 7.59 % |
| 1994 | .27 | 7.29 % |
| 1995 | .31 | 13.30 % |
| 1996 | .33 | 5.81 % |
| 1997 | .33 | 0.13 % |
| 1998 | .27 | -16.67 % |
| 1999 | .27 | 0.00 % |
| 2000 | .15 | -46.67 % |
| 2001 | .09 | -37.50 % |
| 2002 | .02 | -80.00 % |
| 2003 | .02 | 9.97 % |
| 2004 | .02 | -9.07 % |
| 2005 | .04 | 109.97 % |
| 2006 | .07 | 90.47 % |
| 2007 | .29 | 299.99 % |
| 2008 | .53 | 82.60 % |
| 2009 | .46 | -13.41 % |
| 2010 | .46 | -1.19 % |
|
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