|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .37 | NA |
| 1987 | .75 | 104.24 % |
| 1988 | .51 | -32.56 % |
| 1989 | .75 | 48.28 % |
| 1990 | .85 | 13.17 % |
| 1991 | .80 | -5.58 % |
| 1992 | .86 | 6.61 % |
| 1993 | .48 | -44.29 % |
| 1994 | .48 | 1.49 % |
| 1995 | .58 | 19.60 % |
| 1996 | .57 | -0.98 % |
| 1997 | .45 | -21.86 % |
| 1998 | .61 | 36.67 % |
| 1999 | .46 | -25.50 % |
| 2000 | .41 | -10.51 % |
| 2001 | .73 | 77.61 % |
| 2002 | .42 | -42.17 % |
| 2003 | .39 | -5.96 % |
| 2004 | .27 | -32.29 % |
| 2005 | .41 | 55.36 % |
| 2006 | .38 | -8.19 % |
| 2007 | .16 | -56.87 % |
| 2008 | .38 | 133.33 % |
| 2009 | .50 | 30.22 % |
| 2010 | .27 | -46.56 % |
|
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