|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.15 | NA |
| 1987 | 3.88 | 80.97 % |
| 1988 | 3.88 | 0.01 % |
| 1989 | 5.83 | 50.23 % |
| 1990 | 7.68 | 31.66 % |
| 1991 | 5.96 | -22.37 % |
| 1992 | 6.13 | 2.89 % |
| 1993 | .92 | -84.99 % |
| 1994 | 3.20 | 247.92 % |
| 1995 | 3.47 | 8.30 % |
| 1996 | 4.65 | 34.15 % |
| 1997 | 4.48 | -3.73 % |
| 1998 | 4.03 | -10.00 % |
| 1999 | 5.21 | 29.12 % |
| 2000 | 5.11 | -1.85 % |
| 2001 | 4.67 | -8.63 % |
| 2002 | 7.25 | 55.22 % |
| 2003 | 7.40 | 2.08 % |
| 2004 | .53 | -92.80 % |
| 2005 | .50 | -5.92 % |
| 2006 | 4.57 | 811.62 % |
| 2007 | 8.24 | 80.32 % |
| 2008 | 7.84 | -4.87 % |
| 2009 | 8.41 | 7.26 % |
| 2010 | 8.06 | -4.20 % |
|
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