|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .75 | NA |
| 1987 | .75 | 0.01 % |
| 1988 | .77 | 2.43 % |
| 1989 | .77 | 0.01 % |
| 1990 | .77 | 0.00 % |
| 1991 | .78 | 2.38 % |
| 1992 | .80 | 2.32 % |
| 1993 | .80 | 0.00 % |
| 1994 | .82 | 2.27 % |
| 1995 | .93 | 13.33 % |
| 1996 | 1.02 | 9.80 % |
| 1997 | 1.11 | 8.93 % |
| 1998 | .97 | -13.12 % |
| 1999 | 1.57 | 62.28 % |
| 2000 | 1.04 | -33.72 % |
| 2001 | 1.19 | 14.04 % |
| 2002 | 1.57 | 32.31 % |
| 2003 | 2.01 | 27.91 % |
| 2004 | 2.59 | 29.09 % |
| 2005 | 2.83 | 9.16 % |
| 2006 | 4.43 | 56.77 % |
| 2007 | 5.15 | 16.05 % |
| 2008 | 5.58 | 8.51 % |
| 2009 | 4.67 | -16.34 % |
| 2010 | 6.82 | 46.09 % |
|
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