|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .69 | NA |
| 1987 | .72 | 2.94 % |
| 1988 | .71 | -0.27 % |
| 1989 | .72 | 0.27 % |
| 1990 | .76 | 5.71 % |
| 1991 | .76 | 0.00 % |
| 1992 | .75 | -0.27 % |
| 1993 | .78 | 2.98 % |
| 1994 | .78 | 0.00 % |
| 1995 | .80 | 2.63 % |
| 1996 | .79 | -0.27 % |
| 1997 | .80 | 0.27 % |
| 1998 | .80 | 0.00 % |
| 1999 | .80 | 0.00 % |
| 2000 | .92 | 15.07 % |
| 2001 | .94 | 2.50 % |
| 2002 | .94 | 0.00 % |
| 2003 | .94 | 0.00 % |
| 2004 | .94 | -0.27 % |
| 2005 | 1.06 | 13.35 % |
| 2006 | .94 | -11.54 % |
| 2007 | .94 | 0.00 % |
| 2008 | .94 | 0.00 % |
| 2009 | .94 | 0.00 % |
| 2010 | .94 | 0.00 % |
|
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