|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | .42 | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | .95 | NA |
| 1993 | 1.06 | 11.42 % |
| 1994 | 1.10 | 4.00 % |
| 1995 | 1.11 | 1.14 % |
| 1996 | 1.06 | -5.19 % |
| 1997 | 1.06 | 0.27 % |
| 1998 | 1.06 | 0.00 % |
| 1999 | .47 | -56.00 % |
| 2000 | .44 | -4.81 % |
| 2001 | .42 | -4.50 % |
| 2002 | .40 | -5.00 % |
| 2003 | .44 | 10.53 % |
| 2004 | .40 | -9.77 % |
| 2005 | .40 | 0.27 % |
| 2006 | .25 | -36.84 % |
| 2007 | .30 | 16.66 % |
| 2008 | .36 | 21.43 % |
| 2009 | .44 | 23.53 % |
| 2010 | .51 | 14.28 % |
|
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