|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.03 | NA |
| 1987 | 1.16 | 12.62 % |
| 1988 | 1.34 | 15.17 % |
| 1989 | 1.17 | -12.43 % |
| 1990 | .73 | -37.41 % |
| 1991 | .63 | -13.58 % |
| 1992 | 1.04 | 64.92 % |
| 1993 | .92 | -11.80 % |
| 1994 | 1.77 | 91.88 % |
| 1995 | 1.78 | 0.82 % |
| 1996 | 1.53 | -14.07 % |
| 1997 | 1.32 | -13.49 % |
| 1998 | 1.92 | 44.82 % |
| 1999 | 1.84 | -3.90 % |
| 2000 | 1.16 | -36.95 % |
| 2001 | 1.00 | -14.31 % |
| 2002 | 1.00 | 0.00 % |
| 2003 | .95 | -4.26 % |
| 2004 | .91 | -4.71 % |
| 2005 | .72 | -20.71 % |
| 2006 | .72 | 0.00 % |
| 2007 | .80 | 11.77 % |
| 2008 | .57 | -28.95 % |
| 2009 | .04 | -92.59 % |
| 2010 | .04 | 0.00 % |
|
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