|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .12 | NA |
| 1987 | .14 | 20.00 % |
| 1988 | .14 | -0.27 % |
| 1989 | .23 | 67.12 % |
| 1990 | .23 | 0.00 % |
| 1991 | .23 | 0.00 % |
| 1992 | .23 | -0.27 % |
| 1993 | .23 | 0.27 % |
| 1994 | .30 | 30.00 % |
| 1995 | .35 | 15.39 % |
| 1996 | .35 | -0.27 % |
| 1997 | .35 | 0.27 % |
| 1998 | .44 | 26.67 % |
| 1999 | .44 | 0.00 % |
| 2000 | .44 | -0.27 % |
| 2001 | .44 | 0.28 % |
| 2002 | .44 | 0.00 % |
| 2003 | .42 | -5.26 % |
| 2004 | .47 | 10.81 % |
| 2005 | .47 | 0.27 % |
| 2006 | .37 | -20.00 % |
| 2007 | .40 | 6.25 % |
| 2008 | .40 | 0.00 % |
| 2009 | .40 | 0.00 % |
| 2010 | .40 | 0.00 % |
|
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