|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .16 | NA |
| 1987 | .16 | 0.00 % |
| 1988 | .16 | -0.27 % |
| 1989 | .16 | 0.27 % |
| 1990 | .33 | 100.01 % |
| 1991 | .33 | 0.00 % |
| 1992 | .33 | -0.27 % |
| 1993 | .35 | 7.44 % |
| 1994 | .35 | 0.00 % |
| 1995 | .36 | 1.60 % |
| 1996 | .48 | 34.21 % |
| 1997 | .53 | 10.67 % |
| 1998 | .44 | -16.06 % |
| 1999 | .44 | 0.00 % |
| 2000 | .54 | 21.22 % |
| 2001 | .57 | 5.62 % |
| 2002 | .58 | 2.77 % |
| 2003 | .61 | 4.00 % |
| 2004 | .61 | -0.27 % |
| 2005 | .61 | 0.27 % |
| 2006 | .67 | 10.91 % |
| 2007 | .65 | -2.90 % |
| 2008 | .67 | 2.68 % |
| 2009 | .67 | -0.90 % |
| 2010 | .67 | 0.00 % |
|
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