|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.87 | NA |
| 1987 | 4.24 | -13.10 % |
| 1988 | 5.29 | 24.95 % |
| 1989 | 2.89 | -45.33 % |
| 1990 | 2.40 | -16.95 % |
| 1991 | 3.72 | 54.96 % |
| 1992 | 2.11 | -43.42 % |
| 1993 | 2.38 | 13.02 % |
| 1994 | 1.70 | -28.42 % |
| 1995 | .36 | -79.16 % |
| 1996 | .46 | 30.77 % |
| 1997 | .03 | -94.10 % |
| 1998 | .01 | -50.02 % |
| 1999 | 1.23 | 8,905.70 % |
| 2000 | .46 | -62.55 % |
| 2001 | .20 | -55.70 % |
| 2002 | .60 | 195.31 % |
| 2003 | .04 | -93.12 % |
| 2004 | .00 | -93.43 % |
| 2005 | .00 | 0.37 % |
| 2006 | .07 | 2,383.58 % |
| 2007 | .05 | -27.52 % |
| 2008 | 3.39 | 6,773.48 % |
| 2009 | 2.22 | -34.39 % |
| 2010 | 3.50 | 57.35 % |
|
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