|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .63 | NA |
| 1987 | .67 | 6.01 % |
| 1988 | .60 | -10.45 % |
| 1989 | | NA |
| 1990 | .68 | NA |
| 1991 | .60 | -11.76 % |
| 1992 | .84 | 40.80 % |
| 1993 | 1.16 | 37.88 % |
| 1994 | .92 | -20.71 % |
| 1995 | .51 | -44.97 % |
| 1996 | .53 | 4.17 % |
| 1997 | .55 | 4.00 % |
| 1998 | .64 | 15.38 % |
| 1999 | .53 | -16.67 % |
| 2000 | .63 | 18.99 % |
| 2001 | .55 | -12.60 % |
| 2002 | .61 | 11.54 % |
| 2003 | .95 | 55.17 % |
| 2004 | .97 | 1.94 % |
| 2005 | .59 | -38.96 % |
| 2006 | .61 | 3.57 % |
| 2007 | .70 | 13.79 % |
| 2008 | .93 | 33.33 % |
| 2009 | .78 | -15.91 % |
| 2010 | .83 | 5.41 % |
|
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