|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .72 | NA |
| 1987 | .72 | -0.05 % |
| 1988 | .75 | 5.48 % |
| 1989 | .82 | 8.40 % |
| 1990 | .84 | 2.50 % |
| 1991 | .84 | 0.00 % |
| 1992 | .82 | -2.71 % |
| 1993 | .80 | -2.23 % |
| 1994 | .78 | -2.56 % |
| 1995 | .82 | 5.26 % |
| 1996 | .82 | -0.27 % |
| 1997 | .82 | 0.27 % |
| 1998 | .82 | 0.00 % |
| 1999 | .82 | 0.00 % |
| 2000 | .84 | 2.22 % |
| 2001 | .84 | 0.27 % |
| 2002 | .86 | 2.44 % |
| 2003 | .86 | 0.00 % |
| 2004 | .86 | -0.27 % |
| 2005 | .96 | 12.21 % |
| 2006 | .86 | -10.64 % |
| 2007 | .88 | 2.38 % |
| 2008 | .88 | -0.40 % |
| 2009 | .86 | -1.94 % |
| 2010 | .88 | 2.33 % |
|
|