|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .20 | NA |
| 1987 | .22 | 10.00 % |
| 1988 | .24 | 8.79 % |
| 1989 | .25 | 0.27 % |
| 1990 | .25 | 0.00 % |
| 1991 | .29 | 16.66 % |
| 1992 | .29 | -0.27 % |
| 1993 | .31 | 7.44 % |
| 1994 | .37 | 20.00 % |
| 1995 | .29 | -20.64 % |
| 1996 | .37 | 25.67 % |
| 1997 | .37 | 0.28 % |
| 1998 | .37 | 0.00 % |
| 1999 | .37 | 0.00 % |
| 2000 | .37 | -0.27 % |
| 2001 | .37 | 0.27 % |
| 2002 | .37 | 0.00 % |
| 2003 | .41 | 11.11 % |
| 2004 | .45 | 9.70 % |
| 2005 | .47 | 4.83 % |
| 2006 | .76 | 60.87 % |
| 2007 | 1.19 | 56.76 % |
| 2008 | 1.19 | 0.00 % |
| 2009 | 1.23 | 3.45 % |
| 2010 | 1.23 | 0.00 % |
|
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