|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .02 | NA |
| 1987 | | NA |
| 1988 | .02 | NA |
| 1989 | .02 | 0.27 % |
| 1990 | .02 | 0.00 % |
| 1991 | .02 | 0.00 % |
| 1992 | .02 | -0.27 % |
| 1993 | .02 | 0.27 % |
| 1994 | .02 | 0.00 % |
| 1995 | | NA |
| 1996 | | NA |
| 1997 | .02 | NA |
| 1998 | .02 | 0.00 % |
| 1999 | .02 | 0.05 % |
| 2000 | | NA |
| 2001 | | NA |
| 2002 | | NA |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | .02 | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
|
|
