|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .20 | NA |
| 1987 | 1.30 | 549.44 % |
| 1988 | .40 | -69.20 % |
| 1989 | .36 | -10.73 % |
| 1990 | .40 | 12.02 % |
| 1991 | | NA |
| 1992 | .25 | NA |
| 1993 | .16 | -36.14 % |
| 1994 | .28 | 70.11 % |
| 1995 | .36 | 30.77 % |
| 1996 | .36 | -0.27 % |
| 1997 | .42 | 17.97 % |
| 1998 | .42 | 0.00 % |
| 1999 | .80 | 90.00 % |
| 2000 | 1.01 | 25.97 % |
| 2001 | .74 | -26.88 % |
| 2002 | .66 | -11.43 % |
| 2003 | .76 | 16.13 % |
| 2004 | .89 | 16.35 % |
| 2005 | 1.12 | 26.54 % |
| 2006 | 1.93 | 71.70 % |
| 2007 | 1.78 | -7.69 % |
| 2008 | .57 | -67.86 % |
| 2009 | .85 | 48.15 % |
| 2010 | .91 | 7.50 % |
|
|