|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .35 | NA |
| 1987 | .33 | -5.88 % |
| 1988 | 1.06 | 224.12 % |
| 1989 | 1.08 | 2.20 % |
| 1990 | 1.19 | 9.43 % |
| 1991 | 1.31 | 10.34 % |
| 1992 | 1.32 | 1.29 % |
| 1993 | 1.33 | 0.27 % |
| 1994 | 1.33 | 0.00 % |
| 1995 | 1.29 | -2.59 % |
| 1996 | 1.30 | 0.80 % |
| 1997 | 1.31 | 0.27 % |
| 1998 | 1.33 | 1.56 % |
| 1999 | 1.33 | 0.00 % |
| 2000 | 1.30 | -1.81 % |
| 2001 | 1.33 | 1.84 % |
| 2002 | 1.33 | 0.00 % |
| 2003 | 1.35 | 1.54 % |
| 2004 | 1.43 | 5.77 % |
| 2005 | 1.53 | 7.44 % |
| 2006 | 1.94 | 26.67 % |
| 2007 | 2.19 | 12.63 % |
| 2008 | 2.84 | 29.91 % |
| 2009 | 2.74 | -3.60 % |
| 2010 | 2.74 | 0.00 % |
|
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