|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .07 | NA |
| 1987 | .06 | -15.84 % |
| 1988 | .07 | 25.12 % |
| 1989 | .07 | -5.60 % |
| 1990 | .09 | 28.21 % |
| 1991 | .12 | 36.56 % |
| 1992 | .10 | -16.78 % |
| 1993 | .10 | 0.48 % |
| 1994 | .10 | 0.06 % |
| 1995 | .10 | 0.18 % |
| 1996 | .10 | -0.22 % |
| 1997 | .10 | 0.34 % |
| 1998 | .13 | 31.46 % |
| 1999 | .13 | 0.01 % |
| 2000 | .29 | 121.44 % |
| 2001 | .30 | 0.43 % |
| 2002 | .30 | 0.01 % |
| 2003 | .30 | 0.03 % |
| 2004 | .30 | -0.25 % |
| 2005 | .23 | -20.94 % |
| 2006 | .29 | 22.61 % |
| 2007 | .22 | -22.22 % |
| 2008 | .23 | 2.44 % |
| 2009 | .22 | -3.78 % |
| 2010 | .22 | -0.44 % |
|
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