|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .08 | NA |
| 1987 | .09 | 7.26 % |
| 1988 | .09 | 0.65 % |
| 1989 | .09 | 6.54 % |
| 1990 | .09 | -9.46 % |
| 1991 | .99 | 1,056.66 % |
| 1992 | .18 | -82.00 % |
| 1993 | 1.08 | 507.89 % |
| 1994 | 1.13 | 4.93 % |
| 1995 | 1.17 | 3.54 % |
| 1996 | 1.44 | 22.84 % |
| 1997 | 1.09 | -24.66 % |
| 1998 | .27 | -74.98 % |
| 1999 | 1.25 | 359.68 % |
| 2000 | .16 | -87.40 % |
| 2001 | .15 | -2.19 % |
| 2002 | .16 | 3.37 % |
| 2003 | .17 | 7.94 % |
| 2004 | 1.78 | 936.42 % |
| 2005 | 1.78 | 0.00 % |
| 2006 | 2.11 | 18.32 % |
| 2007 | 1.77 | -15.97 % |
| 2008 | 1.66 | -6.19 % |
| 2009 | 1.70 | 2.34 % |
| 2010 | 1.83 | 7.80 % |
|
|