|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .30 | NA |
| 1987 | .30 | -1.55 % |
| 1988 | .42 | 38.44 % |
| 1989 | .52 | 24.71 % |
| 1990 | .57 | 10.00 % |
| 1991 | .53 | -7.12 % |
| 1992 | .53 | -0.27 % |
| 1993 | .53 | 0.27 % |
| 1994 | .55 | 3.45 % |
| 1995 | .55 | 0.00 % |
| 1996 | .55 | -0.27 % |
| 1997 | .57 | 3.62 % |
| 1998 | .57 | 0.00 % |
| 1999 | .57 | 0.00 % |
| 2000 | .58 | 2.95 % |
| 2001 | .60 | 3.41 % |
| 2002 | .60 | 0.00 % |
| 2003 | .62 | 3.03 % |
| 2004 | .64 | 2.66 % |
| 2005 | .68 | 6.00 % |
| 2006 | .92 | 35.95 % |
| 2007 | 1.11 | 21.27 % |
| 2008 | 1.46 | 31.55 % |
| 2009 | 1.33 | -9.03 % |
| 2010 | 1.37 | 2.74 % |
|
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