|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.31 | NA |
| 1987 | 1.20 | -8.35 % |
| 1988 | 1.56 | 29.71 % |
| 1989 | 1.35 | -13.42 % |
| 1990 | 1.07 | -20.69 % |
| 1991 | 1.16 | 8.44 % |
| 1992 | 1.38 | 19.01 % |
| 1993 | 1.68 | 21.48 % |
| 1994 | 1.28 | -23.65 % |
| 1995 | .98 | -23.93 % |
| 1996 | 1.02 | 4.48 % |
| 1997 | .96 | -5.91 % |
| 1998 | 1.64 | 71.43 % |
| 1999 | 1.64 | 0.00 % |
| 2000 | 1.02 | -37.84 % |
| 2001 | .30 | -71.04 % |
| 2002 | .20 | -31.48 % |
| 2003 | .06 | -70.27 % |
| 2004 | .00 | -95.47 % |
| 2005 | .00 | 0.37 % |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | .39 | NA |
| 2009 | .32 | -17.11 % |
| 2010 | .50 | 54.66 % |
|
|
