|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .98 | NA |
| 1987 | .84 | -14.05 % |
| 1988 | .72 | -14.15 % |
| 1989 | .87 | 20.13 % |
| 1990 | .64 | -26.26 % |
| 1991 | .62 | -3.46 % |
| 1992 | .68 | 9.85 % |
| 1993 | .08 | -88.95 % |
| 1994 | .45 | 496.74 % |
| 1995 | .72 | 59.52 % |
| 1996 | .52 | -27.44 % |
| 1997 | .50 | -3.63 % |
| 1998 | .55 | 10.13 % |
| 1999 | .51 | -7.69 % |
| 2000 | .61 | 20.50 % |
| 2001 | .36 | -41.85 % |
| 2002 | .59 | 66.50 % |
| 2003 | .57 | -3.57 % |
| 2004 | .51 | -11.35 % |
| 2005 | .85 | 67.12 % |
| 2006 | .44 | -47.50 % |
| 2007 | .49 | 9.52 % |
| 2008 | .55 | 13.04 % |
| 2009 | .34 | -38.46 % |
| 2010 | .34 | 0.00 % |
|
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