|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.68 | NA |
| 1987 | 2.65 | -1.05 % |
| 1988 | 2.35 | -11.44 % |
| 1989 | .55 | -76.55 % |
| 1990 | 1.84 | 233.94 % |
| 1991 | 1.70 | -7.61 % |
| 1992 | 1.72 | 0.98 % |
| 1993 | 1.46 | -14.68 % |
| 1994 | 1.81 | 23.63 % |
| 1995 | | NA |
| 1996 | | NA |
| 1997 | | NA |
| 1998 | | NA |
| 1999 | | NA |
| 2000 | .82 | NA |
| 2001 | .64 | -22.87 % |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | .68 | NA |
| 2006 | .51 | -25.00 % |
| 2007 | .44 | -12.50 % |
| 2008 | | NA |
| 2009 | .44 | NA |
| 2010 | .32 | -28.57 % |
|
|