|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .74 | NA |
| 1987 | .60 | -19.10 % |
| 1988 | | NA |
| 1989 | .60 | NA |
| 1990 | .62 | 3.33 % |
| 1991 | .51 | -17.74 % |
| 1992 | .63 | 24.24 % |
| 1993 | .68 | 6.96 % |
| 1994 | | NA |
| 1995 | .74 | NA |
| 1996 | .74 | -0.27 % |
| 1997 | 2.35 | 218.01 % |
| 1998 | 2.35 | 0.00 % |
| 1999 | 2.35 | 0.00 % |
| 2000 | 2.34 | -0.27 % |
| 2001 | 2.35 | 0.27 % |
| 2002 | .93 | -60.36 % |
| 2003 | .97 | 4.54 % |
| 2004 | .97 | -0.27 % |
| 2005 | .97 | 0.27 % |
| 2006 | 1.00 | 2.17 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
|
|