|
| year | consumption | change |
| 1984 | .47 | NA |
| 1985 | .62 | 33.70 % |
| 1986 | .21 | -65.79 % |
| 1987 | .41 | 93.59 % |
| 1988 | .58 | 40.01 % |
| 1989 | .55 | -5.87 % |
| 1990 | .64 | 17.59 % |
| 1991 | 2.14 | 233.76 % |
| 1992 | 2.98 | 39.44 % |
| 1993 | 2.62 | -12.12 % |
| 1994 | 2.42 | -7.52 % |
| 1995 | 1.15 | -52.54 % |
| 1996 | .73 | -36.36 % |
| 1997 | .26 | -64.08 % |
| 1998 | .26 | -1.04 % |
| 1999 | .21 | -20.00 % |
| 2000 | .07 | -68.51 % |
| 2001 | .22 | 234.27 % |
| 2002 | .18 | -20.00 % |
| 2003 | .02 | -87.50 % |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | .00 | NA |
| 2010 | | NA |
|
|
