|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .72 | NA |
| 1987 | .74 | 2.86 % |
| 1988 | .74 | 0.00 % |
| 1989 | .74 | 0.00 % |
| 1990 | .74 | 0.00 % |
| 1991 | .76 | 2.78 % |
| 1992 | .78 | 2.70 % |
| 1993 | .78 | 0.00 % |
| 1994 | .80 | 2.63 % |
| 1995 | 3.78 | 374.35 % |
| 1996 | 4.54 | 19.99 % |
| 1997 | 7.09 | 56.32 % |
| 1998 | 7.91 | 11.52 % |
| 1999 | 7.17 | -9.29 % |
| 2000 | 7.73 | 7.69 % |
| 2001 | 9.46 | 22.49 % |
| 2002 | 10.06 | 6.26 % |
| 2003 | 10.85 | 7.93 % |
| 2004 | 11.85 | 9.23 % |
| 2005 | 12.47 | 5.17 % |
| 2006 | 11.61 | -6.89 % |
| 2007 | 12.53 | 7.92 % |
| 2008 | 12.81 | 2.28 % |
| 2009 | 11.51 | -10.21 % |
| 2010 | 11.65 | 1.24 % |
|
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