|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .20 | NA |
| 1987 | .20 | 0.00 % |
| 1988 | .47 | 133.06 % |
| 1989 | .47 | 0.27 % |
| 1990 | .47 | 0.00 % |
| 1991 | .70 | 50.00 % |
| 1992 | .82 | 16.35 % |
| 1993 | 1.05 | 28.92 % |
| 1994 | 1.05 | 0.00 % |
| 1995 | 1.10 | 4.44 % |
| 1996 | 1.05 | -4.52 % |
| 1997 | 1.17 | 11.42 % |
| 1998 | 1.17 | 0.00 % |
| 1999 | 1.17 | 0.00 % |
| 2000 | 1.19 | 1.72 % |
| 2001 | 1.19 | 0.27 % |
| 2002 | 1.19 | 0.00 % |
| 2003 | 1.26 | 5.88 % |
| 2004 | 1.28 | 1.57 % |
| 2005 | 1.33 | 3.92 % |
| 2006 | 1.31 | -1.75 % |
| 2007 | 1.33 | 1.79 % |
| 2008 | 1.34 | 0.89 % |
| 2009 | 1.36 | 1.48 % |
| 2010 | 1.36 | 0.00 % |
|
|