|
| year | consumption | change |
| 1980 | 5.51 | NA |
| 1981 | 9.92 | 80.00 % |
| 1982 | 3.31 | -66.67 % |
| 1983 | 6.61 | 100.00 % |
| 1984 | 9.92 | 50.00 % |
| 1985 | 20.94 | 111.11 % |
| 1986 | 12.13 | -42.11 % |
| 1987 | 19.84 | 63.64 % |
| 1988 | 23.15 | 16.67 % |
| 1989 | 22.05 | -4.76 % |
| 1990 | 37.48 | 70.00 % |
| 1991 | .06 | -99.84 % |
| 1992 | 35.49 | 58,442.69 % |
| 1993 | 12.79 | -63.98 % |
| 1994 | 10.91 | -14.66 % |
| 1995 | 4.74 | -56.57 % |
| 1996 | 1.02 | -78.40 % |
| 1997 | .82 | -19.59 % |
| 1998 | 1.18 | 43.37 % |
| 1999 | .07 | -93.74 % |
| 2000 | .14 | 83.59 % |
| 2001 | .61 | 347.50 % |
| 2002 | 11.58 | 1,808.95 % |
| 2003 | 14.63 | 26.30 % |
| 2004 | 13.74 | -6.04 % |
| 2005 | 4.41 | -67.92 % |
| 2006 | 7.72 | 75.00 % |
| 2007 | 13.23 | 71.43 % |
| 2008 | 7.72 | -41.67 % |
| 2009 | 6.61 | -14.29 % |
| 2010 | 13.23 | 100.00 % |
| 2011 | 12.13 | -8.33 % |
|
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