|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | .77 | NA |
| 1988 | .92 | 19.58 % |
| 1989 | .96 | 4.20 % |
| 1990 | .96 | 0.36 % |
| 1991 | 1.19 | 23.14 % |
| 1992 | 1.36 | 15.07 % |
| 1993 | 2.52 | 84.50 % |
| 1994 | 2.52 | 0.00 % |
| 1995 | 2.55 | 1.45 % |
| 1996 | 2.55 | -0.27 % |
| 1997 | 2.55 | 0.27 % |
| 1998 | 2.59 | 1.43 % |
| 1999 | 2.59 | 0.00 % |
| 2000 | 2.60 | 0.43 % |
| 2001 | 2.61 | 0.27 % |
| 2002 | 2.63 | 0.70 % |
| 2003 | 2.74 | 4.17 % |
| 2004 | 2.64 | -3.60 % |
| 2005 | 2.76 | 4.42 % |
| 2006 | 2.74 | -0.66 % |
| 2007 | 2.79 | 2.00 % |
| 2008 | 2.83 | 1.31 % |
| 2009 | .80 | -71.61 % |
| 2010 | .80 | 0.00 % |
|
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