|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .51 | NA |
| 1987 | .57 | 12.00 % |
| 1988 | .59 | 3.29 % |
| 1989 | .57 | -3.18 % |
| 1990 | .61 | 7.14 % |
| 1991 | .63 | 3.33 % |
| 1992 | .63 | -0.27 % |
| 1993 | .67 | 6.74 % |
| 1994 | .69 | 3.03 % |
| 1995 | .69 | 0.00 % |
| 1996 | .69 | -0.27 % |
| 1997 | .69 | 0.27 % |
| 1998 | .72 | 2.94 % |
| 1999 | .72 | 0.00 % |
| 2000 | .84 | 16.82 % |
| 2001 | .96 | 14.95 % |
| 2002 | .94 | -2.13 % |
| 2003 | .94 | 0.00 % |
| 2004 | .94 | -0.27 % |
| 2005 | .94 | 0.27 % |
| 2006 | 1.16 | 23.91 % |
| 2007 | 1.21 | 3.51 % |
| 2008 | 1.29 | 6.78 % |
| 2009 | .98 | -23.81 % |
| 2010 | 1.12 | 14.58 % |
|
|