|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | .49 | NA |
| 1988 | 1.17 | 139.27 % |
| 1989 | 1.12 | -4.16 % |
| 1990 | 1.33 | 18.64 % |
| 1991 | 2.00 | 50.39 % |
| 1992 | .13 | -93.62 % |
| 1993 | 1.92 | 1,404.19 % |
| 1994 | 1.92 | 0.00 % |
| 1995 | 1.90 | -0.95 % |
| 1996 | 1.89 | -0.27 % |
| 1997 | 1.90 | 0.27 % |
| 1998 | 1.79 | -5.77 % |
| 1999 | 1.79 | 0.00 % |
| 2000 | 1.84 | 2.78 % |
| 2001 | 1.82 | -0.72 % |
| 2002 | 1.84 | 1.00 % |
| 2003 | 1.84 | 0.00 % |
| 2004 | 1.91 | 3.68 % |
| 2005 | 1.97 | 3.14 % |
| 2006 | 2.48 | 25.93 % |
| 2007 | 2.50 | 0.74 % |
| 2008 | 2.52 | 0.73 % |
| 2009 | 2.74 | 8.70 % |
| 2010 | 2.74 | 0.00 % |
|
|