|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .54 | NA |
| 1987 | .59 | 8.28 % |
| 1988 | .60 | 3.25 % |
| 1989 | | NA |
| 1990 | .67 | NA |
| 1991 | .72 | 7.44 % |
| 1992 | .73 | 0.97 % |
| 1993 | .79 | 8.99 % |
| 1994 | .79 | 0.00 % |
| 1995 | .83 | 4.00 % |
| 1996 | .82 | -0.27 % |
| 1997 | .83 | 0.27 % |
| 1998 | .95 | 15.38 % |
| 1999 | .95 | 0.00 % |
| 2000 | 1.11 | 16.35 % |
| 2001 | 1.18 | 6.00 % |
| 2002 | 1.18 | 0.00 % |
| 2003 | 1.21 | 2.70 % |
| 2004 | 1.20 | -0.27 % |
| 2005 | 1.11 | -7.64 % |
| 2006 | 1.21 | 8.57 % |
| 2007 | 1.24 | 2.63 % |
| 2008 | 1.24 | 0.00 % |
| 2009 | 1.24 | 0.00 % |
| 2010 | 1.24 | 0.00 % |
|
|