|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .04 | NA |
| 1987 | .04 | 0.00 % |
| 1988 | .06 | 49.61 % |
| 1989 | .06 | 0.27 % |
| 1990 | .06 | 0.00 % |
| 1991 | .08 | 33.34 % |
| 1992 | .08 | -0.27 % |
| 1993 | .11 | 25.34 % |
| 1994 | .15 | 39.99 % |
| 1995 | .14 | -3.49 % |
| 1996 | .15 | 3.34 % |
| 1997 | .15 | 0.27 % |
| 1998 | .15 | 0.00 % |
| 1999 | .15 | 0.01 % |
| 2000 | .15 | -0.28 % |
| 2001 | .15 | 0.28 % |
| 2002 | .15 | 0.00 % |
| 2003 | .17 | 14.28 % |
| 2004 | .19 | 12.19 % |
| 2005 | .19 | 0.27 % |
| 2006 | .21 | 11.11 % |
| 2007 | .23 | 10.00 % |
| 2008 | .23 | 0.00 % |
| 2009 | .25 | 9.09 % |
| 2010 | .25 | 0.00 % |
|
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