|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .24 | NA |
| 1987 | .24 | 0.03 % |
| 1988 | .20 | -13.67 % |
| 1989 | .43 | 113.97 % |
| 1990 | .46 | 5.28 % |
| 1991 | .27 | -41.03 % |
| 1992 | .29 | 6.32 % |
| 1993 | .37 | 28.89 % |
| 1994 | .43 | 17.27 % |
| 1995 | .43 | 0.10 % |
| 1996 | .43 | -0.23 % |
| 1997 | .43 | 0.29 % |
| 1998 | .43 | 0.01 % |
| 1999 | .43 | 0.00 % |
| 2000 | .47 | 7.08 % |
| 2001 | .47 | 0.28 % |
| 2002 | .56 | 20.49 % |
| 2003 | .60 | 5.86 % |
| 2004 | .63 | 5.14 % |
| 2005 | .66 | 5.56 % |
| 2006 | .63 | -4.99 % |
| 2007 | .67 | 6.32 % |
| 2008 | .68 | 2.38 % |
| 2009 | .41 | -40.71 % |
| 2010 | .41 | 0.00 % |
|
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