|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .36 | NA |
| 1987 | .70 | 96.19 % |
| 1988 | .87 | 23.79 % |
| 1989 | .80 | -7.83 % |
| 1990 | .83 | 2.97 % |
| 1991 | .64 | -22.99 % |
| 1992 | .89 | 39.62 % |
| 1993 | .68 | -23.60 % |
| 1994 | .64 | -6.25 % |
| 1995 | .68 | 6.67 % |
| 1996 | .65 | -3.39 % |
| 1997 | .68 | 3.51 % |
| 1998 | .66 | -3.12 % |
| 1999 | .68 | 3.23 % |
| 2000 | .32 | -53.25 % |
| 2001 | .34 | 6.96 % |
| 2002 | .34 | 0.00 % |
| 2003 | .36 | 6.25 % |
| 2004 | .38 | 5.59 % |
| 2005 | .40 | 5.84 % |
| 2006 | .32 | -21.05 % |
| 2007 | .32 | 0.00 % |
| 2008 | .44 | 40.00 % |
| 2009 | .47 | 4.76 % |
| 2010 | .38 | -18.18 % |
|
|