|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.36 | NA |
| 1987 | 3.94 | 17.38 % |
| 1988 | 3.88 | -1.65 % |
| 1989 | 4.22 | 8.78 % |
| 1990 | 4.60 | 9.04 % |
| 1991 | 3.83 | -16.83 % |
| 1992 | 4.60 | 20.26 % |
| 1993 | 4.43 | -3.63 % |
| 1994 | 2.03 | -54.13 % |
| 1995 | 5.31 | 160.83 % |
| 1996 | 1.74 | -67.28 % |
| 1997 | .74 | -57.34 % |
| 1998 | .62 | -16.48 % |
| 1999 | .59 | -5.16 % |
| 2000 | .55 | -6.14 % |
| 2001 | 2.94 | 434.58 % |
| 2002 | 3.35 | 13.70 % |
| 2003 | .92 | -72.45 % |
| 2004 | .68 | -26.71 % |
| 2005 | 1.31 | 93.29 % |
| 2006 | .83 | -36.36 % |
| 2007 | .03 | -96.18 % |
| 2008 | 1.33 | 4,100.09 % |
| 2009 | .80 | -40.10 % |
| 2010 | 2.81 | 250.95 % |
|
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