|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | .42 | NA |
| 1991 | .46 | 8.60 % |
| 1992 | .42 | -8.17 % |
| 1993 | 1.23 | 190.80 % |
| 1994 | 1.27 | 3.45 % |
| 1995 | 1.27 | 0.00 % |
| 1996 | 1.27 | -0.27 % |
| 1997 | 1.31 | 3.62 % |
| 1998 | 1.31 | 0.00 % |
| 1999 | 1.31 | 0.00 % |
| 2000 | 1.44 | 9.38 % |
| 2001 | 1.48 | 3.22 % |
| 2002 | 1.48 | 0.00 % |
| 2003 | 1.48 | 0.00 % |
| 2004 | 1.48 | -0.27 % |
| 2005 | 1.48 | 0.27 % |
| 2006 | 1.48 | 0.00 % |
| 2007 | 1.50 | 1.43 % |
| 2008 | 1.50 | 0.00 % |
| 2009 | 1.50 | 0.00 % |
| 2010 | 1.50 | 0.00 % |
|
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