|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .25 | NA |
| 1987 | .29 | 12.50 % |
| 1988 | .32 | 10.81 % |
| 1989 | .35 | 10.30 % |
| 1990 | .38 | 9.09 % |
| 1991 | .41 | 8.34 % |
| 1992 | .48 | 15.07 % |
| 1993 | .54 | 13.65 % |
| 1994 | .60 | 11.76 % |
| 1995 | .67 | 10.53 % |
| 1996 | .73 | 9.23 % |
| 1997 | .67 | -8.45 % |
| 1998 | .73 | 9.52 % |
| 1999 | .73 | 0.00 % |
| 2000 | .79 | 8.40 % |
| 2001 | .79 | 0.27 % |
| 2002 | .79 | 0.00 % |
| 2003 | .87 | 9.12 % |
| 2004 | .94 | 8.84 % |
| 2005 | .86 | -9.07 % |
| 2006 | 1.02 | 18.52 % |
| 2007 | 1.11 | 9.37 % |
| 2008 | 1.26 | 13.57 % |
| 2009 | 1.26 | -0.03 % |
| 2010 | 1.29 | 2.42 % |
|
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