|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .79 | NA |
| 1987 | .82 | 4.05 % |
| 1988 | .89 | 8.31 % |
| 1989 | 1.10 | 23.83 % |
| 1990 | 1.12 | 2.13 % |
| 1991 | 1.52 | 35.42 % |
| 1992 | 1.51 | -0.27 % |
| 1993 | 1.96 | 29.25 % |
| 1994 | 1.54 | -21.23 % |
| 1995 | 1.59 | 3.03 % |
| 1996 | 1.63 | 2.66 % |
| 1997 | 1.64 | 0.27 % |
| 1998 | 1.64 | 0.00 % |
| 1999 | 1.64 | 0.00 % |
| 2000 | 1.68 | 2.58 % |
| 2001 | 1.68 | 0.27 % |
| 2002 | 1.68 | 0.00 % |
| 2003 | 1.68 | 0.00 % |
| 2004 | 2.21 | 31.58 % |
| 2005 | 2.38 | 7.66 % |
| 2006 | 2.15 | -9.80 % |
| 2007 | 2.17 | 1.09 % |
| 2008 | 1.79 | -17.54 % |
| 2009 | 1.82 | 1.72 % |
| 2010 | 1.82 | 0.00 % |
|
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