|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .08 | NA |
| 1987 | .08 | 0.00 % |
| 1988 | .07 | -10.12 % |
| 1989 | .07 | -2.00 % |
| 1990 | .08 | 18.63 % |
| 1991 | .18 | 117.07 % |
| 1992 | .07 | -62.04 % |
| 1993 | .06 | -5.92 % |
| 1994 | .06 | -1.59 % |
| 1995 | .06 | -9.74 % |
| 1996 | .03 | -44.70 % |
| 1997 | .03 | -0.10 % |
| 1998 | .06 | 98.06 % |
| 1999 | .06 | 4.00 % |
| 2000 | .08 | 22.10 % |
| 2001 | .02 | -79.14 % |
| 2002 | .02 | 0.18 % |
| 2003 | .02 | -2.52 % |
| 2004 | .02 | 0.88 % |
| 2005 | .01 | -15.50 % |
| 2006 | .01 | -23.30 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | .01 | NA |
| 2010 | .01 | -4.09 % |
|
|
