|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | .30 | NA |
| 1988 | .11 | -64.33 % |
| 1989 | .21 | 98.13 % |
| 1990 | .23 | 8.49 % |
| 1991 | .11 | -53.55 % |
| 1992 | .10 | -2.83 % |
| 1993 | 3.39 | 3,161.43 % |
| 1994 | .09 | -97.25 % |
| 1995 | | NA |
| 1996 | .09 | NA |
| 1997 | .08 | -8.45 % |
| 1998 | .06 | -21.12 % |
| 1999 | .06 | 0.00 % |
| 2000 | .06 | -0.27 % |
| 2001 | .06 | 0.27 % |
| 2002 | .08 | 19.03 % |
| 2003 | .08 | 0.00 % |
| 2004 | .10 | 26.46 % |
| 2005 | .23 | 143.61 % |
| 2006 | .34 | 45.45 % |
| 2007 | 1.27 | 275.00 % |
| 2008 | .83 | -35.00 % |
| 2009 | .17 | -79.49 % |
| 2010 | | NA |
|
|