|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .47 | NA |
| 1987 | .69 | 47.83 % |
| 1988 | .71 | 2.66 % |
| 1989 | .72 | 0.27 % |
| 1990 | .78 | 8.57 % |
| 1991 | .72 | -7.89 % |
| 1992 | .71 | -0.27 % |
| 1993 | .74 | 3.14 % |
| 1994 | .78 | 5.55 % |
| 1995 | .78 | 0.00 % |
| 1996 | .77 | -0.27 % |
| 1997 | .82 | 5.55 % |
| 1998 | .82 | 0.00 % |
| 1999 | .82 | 0.00 % |
| 2000 | .86 | 4.71 % |
| 2001 | .88 | 2.66 % |
| 2002 | .88 | 0.00 % |
| 2003 | .94 | 6.98 % |
| 2004 | 1.02 | 8.40 % |
| 2005 | 1.14 | 12.31 % |
| 2006 | 1.29 | 12.50 % |
| 2007 | 1.02 | -20.63 % |
| 2008 | 1.04 | 2.00 % |
| 2009 | 1.06 | 1.96 % |
| 2010 | 1.06 | 0.00 % |
|
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