|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .10 | NA |
| 1987 | .11 | 8.11 % |
| 1988 | .08 | -27.70 % |
| 1989 | .14 | 76.35 % |
| 1990 | .17 | 21.57 % |
| 1991 | .12 | -29.04 % |
| 1992 | .20 | 69.99 % |
| 1993 | .18 | -13.09 % |
| 1994 | .25 | 38.46 % |
| 1995 | .15 | -41.11 % |
| 1996 | .10 | -34.15 % |
| 1997 | .13 | 32.94 % |
| 1998 | .16 | 29.31 % |
| 1999 | .14 | -16.66 % |
| 2000 | .11 | -16.23 % |
| 2001 | .10 | -16.44 % |
| 2002 | .08 | -11.43 % |
| 2003 | .05 | -35.49 % |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | .38 | NA |
|
|
