|
| year | consumption | change |
| 1984 | .20 | NA |
| 1985 | .21 | 5.85 % |
| 1986 | .22 | 5.26 % |
| 1987 | .21 | -5.00 % |
| 1988 | .33 | 56.15 % |
| 1989 | .18 | -43.54 % |
| 1990 | .14 | -22.39 % |
| 1991 | .10 | -30.77 % |
| 1992 | .05 | -44.60 % |
| 1993 | .03 | -39.82 % |
| 1994 | .03 | 0.00 % |
| 1995 | .12 | 258.30 % |
| 1996 | .07 | -39.70 % |
| 1997 | .04 | -38.29 % |
| 1998 | .05 | 18.73 % |
| 1999 | .03 | -36.83 % |
| 2000 | .03 | -0.27 % |
| 2001 | .03 | 0.27 % |
| 2002 | .03 | 0.00 % |
| 2003 | .13 | 299.97 % |
| 2004 | .10 | -25.21 % |
| 2005 | .07 | -33.15 % |
| 2006 | .03 | -49.99 % |
| 2007 | .07 | 99.97 % |
| 2008 | .03 | -50.13 % |
| 2009 | .03 | 0.27 % |
| 2010 | | NA |
|
|
