|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | .37 | NA |
| 1988 | .41 | 10.81 % |
| 1989 | .43 | 5.29 % |
| 1990 | .47 | 9.52 % |
| 1991 | .47 | 0.00 % |
| 1992 | .47 | -0.27 % |
| 1993 | .51 | 8.99 % |
| 1994 | .51 | 0.00 % |
| 1995 | .53 | 4.00 % |
| 1996 | .53 | -0.27 % |
| 1997 | .53 | 0.27 % |
| 1998 | .53 | 0.00 % |
| 1999 | .53 | 0.00 % |
| 2000 | .59 | 11.23 % |
| 2001 | .61 | 3.73 % |
| 2002 | .65 | 6.67 % |
| 2003 | .69 | 6.25 % |
| 2004 | .69 | -0.27 % |
| 2005 | .72 | 3.22 % |
| 2006 | .72 | 0.00 % |
| 2007 | .72 | 0.00 % |
| 2008 | .69 | -3.91 % |
| 2009 | .75 | 8.89 % |
| 2010 | .75 | 0.00 % |
|
|