|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.91 | NA |
| 1987 | 5.30 | 7.94 % |
| 1988 | 5.37 | 1.41 % |
| 1989 | 5.69 | 5.91 % |
| 1990 | 6.81 | 19.72 % |
| 1991 | 7.82 | 14.83 % |
| 1992 | 7.84 | 0.25 % |
| 1993 | .14 | -98.19 % |
| 1994 | 2.20 | 1,445.62 % |
| 1995 | .45 | -79.34 % |
| 1996 | .51 | 12.16 % |
| 1997 | .46 | -9.38 % |
| 1998 | .53 | 14.71 % |
| 1999 | .55 | 4.28 % |
| 2000 | .48 | -13.54 % |
| 2001 | .47 | -1.47 % |
| 2002 | .47 | -0.21 % |
| 2003 | .53 | 12.27 % |
| 2004 | .58 | 10.45 % |
| 2005 | .59 | 1.18 % |
| 2006 | .63 | 6.67 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | .59 | NA |
| 2010 | .57 | -3.03 % |
|
|
