|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .74 | NA |
| 1987 | .60 | -19.05 % |
| 1988 | .87 | 44.32 % |
| 1989 | .72 | -17.03 % |
| 1990 | .89 | 23.80 % |
| 1991 | .93 | 4.76 % |
| 1992 | .95 | 1.99 % |
| 1993 | 1.02 | 6.96 % |
| 1994 | 1.06 | 4.17 % |
| 1995 | 1.04 | -2.00 % |
| 1996 | 1.03 | -0.27 % |
| 1997 | 1.06 | 2.32 % |
| 1998 | 1.02 | -4.00 % |
| 1999 | 1.02 | 0.00 % |
| 2000 | 1.06 | 3.88 % |
| 2001 | 1.10 | 4.28 % |
| 2002 | .95 | -13.46 % |
| 2003 | .80 | -16.52 % |
| 2004 | .84 | 6.19 % |
| 2005 | 1.06 | 25.34 % |
| 2006 | 1.02 | -4.00 % |
| 2007 | .85 | -16.67 % |
| 2008 | 1.55 | 82.50 % |
| 2009 | 1.26 | -18.63 % |
| 2010 | 1.26 | 0.00 % |
|
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