|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .20 | NA |
| 1987 | .20 | 0.00 % |
| 1988 | .11 | -45.41 % |
| 1989 | .11 | 0.27 % |
| 1990 | .13 | 16.67 % |
| 1991 | .13 | 0.00 % |
| 1992 | .15 | 13.98 % |
| 1993 | .18 | 25.34 % |
| 1994 | .22 | 20.00 % |
| 1995 | .18 | -16.67 % |
| 1996 | .18 | -0.27 % |
| 1997 | .18 | 0.27 % |
| 1998 | .18 | 0.00 % |
| 1999 | .18 | 0.01 % |
| 2000 | .22 | 19.67 % |
| 2001 | .26 | 16.99 % |
| 2002 | .26 | 0.00 % |
| 2003 | .26 | 0.00 % |
| 2004 | .25 | -0.27 % |
| 2005 | .26 | 0.27 % |
| 2006 | .68 | 164.29 % |
| 2007 | .57 | -16.22 % |
| 2008 | .13 | -77.54 % |
| 2009 | .19 | 53.29 % |
| 2010 | .21 | 9.68 % |
|
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