|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .70 | NA |
| 1987 | .70 | 0.00 % |
| 1988 | 1.00 | 43.16 % |
| 1989 | 1.00 | 0.27 % |
| 1990 | 1.03 | 2.33 % |
| 1991 | 1.05 | 2.27 % |
| 1992 | 1.07 | 1.94 % |
| 1993 | 1.08 | 0.27 % |
| 1994 | 1.10 | 2.17 % |
| 1995 | 1.10 | 0.00 % |
| 1996 | 1.10 | -0.27 % |
| 1997 | 1.10 | 0.27 % |
| 1998 | 1.10 | 0.00 % |
| 1999 | 1.10 | 0.00 % |
| 2000 | 1.14 | 3.97 % |
| 2001 | 1.15 | 0.27 % |
| 2002 | 1.19 | 4.08 % |
| 2003 | 1.19 | 0.00 % |
| 2004 | 1.19 | -0.27 % |
| 2005 | 1.19 | 0.27 % |
| 2006 | 1.50 | 25.49 % |
| 2007 | 1.45 | -3.13 % |
| 2008 | .99 | -31.59 % |
| 2009 | 1.69 | 70.77 % |
| 2010 | 1.68 | -0.79 % |
|
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