|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.60 | NA |
| 1987 | 1.32 | -49.21 % |
| 1988 | 1.67 | 26.45 % |
| 1989 | 1.59 | -4.72 % |
| 1990 | .98 | -38.46 % |
| 1991 | .72 | -27.08 % |
| 1992 | .71 | -0.27 % |
| 1993 | .78 | 8.87 % |
| 1994 | .78 | 0.00 % |
| 1995 | .78 | 0.00 % |
| 1996 | .79 | 2.35 % |
| 1997 | .82 | 2.85 % |
| 1998 | .82 | 0.00 % |
| 1999 | .82 | 0.00 % |
| 2000 | .92 | 12.19 % |
| 2001 | .92 | 0.27 % |
| 2002 | .98 | 6.67 % |
| 2003 | 1.02 | 4.17 % |
| 2004 | 1.04 | 1.72 % |
| 2005 | 1.12 | 8.14 % |
| 2006 | 1.43 | 27.27 % |
| 2007 | 1.78 | 24.29 % |
| 2008 | 1.59 | -10.48 % |
| 2009 | .91 | -42.84 % |
| 2010 | .91 | 0.00 % |
|
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