|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .49 | NA |
| 1987 | .59 | 20.53 % |
| 1988 | .62 | 4.59 % |
| 1989 | .75 | 21.99 % |
| 1990 | .87 | 16.38 % |
| 1991 | .81 | -6.85 % |
| 1992 | .97 | 18.69 % |
| 1993 | .94 | -2.35 % |
| 1994 | 1.99 | 110.67 % |
| 1995 | .82 | -58.49 % |
| 1996 | 1.42 | 72.31 % |
| 1997 | 1.60 | 12.39 % |
| 1998 | 1.88 | 17.52 % |
| 1999 | 2.29 | 21.93 % |
| 2000 | 2.85 | 24.66 % |
| 2001 | 2.44 | -14.63 % |
| 2002 | 3.29 | 34.93 % |
| 2003 | 3.42 | 3.93 % |
| 2004 | 3.31 | -3.07 % |
| 2005 | 2.94 | -11.27 % |
| 2006 | 3.20 | 8.83 % |
| 2007 | 3.46 | 8.36 % |
| 2008 | 3.37 | -2.75 % |
| 2009 | 3.41 | 1.25 % |
| 2010 | 3.61 | 5.71 % |
|
|
