|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .40 | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | .51 | NA |
| 1991 | .37 | -27.58 % |
| 1992 | .57 | 54.12 % |
| 1993 | .59 | 3.99 % |
| 1994 | .64 | 7.14 % |
| 1995 | .64 | 0.00 % |
| 1996 | .63 | -0.27 % |
| 1997 | .64 | 0.27 % |
| 1998 | .64 | 0.00 % |
| 1999 | .64 | 0.00 % |
| 2000 | .76 | 19.67 % |
| 2001 | .76 | 0.27 % |
| 2002 | .78 | 2.78 % |
| 2003 | .78 | 0.00 % |
| 2004 | .80 | 2.42 % |
| 2005 | .83 | 2.91 % |
| 2006 | .83 | 0.00 % |
| 2007 | .87 | 5.13 % |
| 2008 | .87 | 0.32 % |
| 2009 | .89 | 2.07 % |
| 2010 | .89 | 0.00 % |
|
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