|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.24 | NA |
| 1987 | 1.31 | 5.57 % |
| 1988 | 1.43 | 9.26 % |
| 1989 | 1.26 | -11.77 % |
| 1990 | .68 | -46.30 % |
| 1991 | .56 | -17.24 % |
| 1992 | .56 | -0.27 % |
| 1993 | .63 | 12.81 % |
| 1994 | .63 | 0.00 % |
| 1995 | .63 | 0.00 % |
| 1996 | .68 | 7.11 % |
| 1997 | .68 | 0.27 % |
| 1998 | .77 | 13.79 % |
| 1999 | .77 | 0.00 % |
| 2000 | .77 | -0.27 % |
| 2001 | .79 | 3.31 % |
| 2002 | .84 | 5.88 % |
| 2003 | .84 | 0.00 % |
| 2004 | .86 | 2.50 % |
| 2005 | .91 | 5.69 % |
| 2006 | 1.17 | 28.21 % |
| 2007 | 1.22 | 4.00 % |
| 2008 | 1.03 | -14.88 % |
| 2009 | 1.38 | 33.87 % |
| 2010 | 1.38 | 0.00 % |
|
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