|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .04 | NA |
| 1987 | .04 | 0.00 % |
| 1988 | .14 | 249.08 % |
| 1989 | .16 | 14.60 % |
| 1990 | .14 | -12.50 % |
| 1991 | .14 | 0.00 % |
| 1992 | .14 | -0.27 % |
| 1993 | .14 | 0.27 % |
| 1994 | .14 | 0.00 % |
| 1995 | .16 | 14.29 % |
| 1996 | .14 | -12.74 % |
| 1997 | .16 | 14.60 % |
| 1998 | .14 | -12.50 % |
| 1999 | .14 | 0.01 % |
| 2000 | .14 | -0.27 % |
| 2001 | .14 | 0.27 % |
| 2002 | .16 | 14.29 % |
| 2003 | .16 | 0.00 % |
| 2004 | .18 | 12.19 % |
| 2005 | .20 | 11.42 % |
| 2006 | .18 | -10.00 % |
| 2007 | .20 | 11.11 % |
| 2008 | .20 | 0.00 % |
| 2009 | .20 | 0.00 % |
| 2010 | .20 | 0.00 % |
|
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