|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.84 | NA |
| 1987 | 1.55 | -15.71 % |
| 1988 | 2.35 | 51.13 % |
| 1989 | .56 | -76.10 % |
| 1990 | .64 | 13.48 % |
| 1991 | .79 | 23.92 % |
| 1992 | 1.05 | 33.16 % |
| 1993 | .47 | -55.15 % |
| 1994 | 1.13 | 139.59 % |
| 1995 | 1.28 | 13.09 % |
| 1996 | 1.29 | 1.20 % |
| 1997 | 1.28 | -1.10 % |
| 1998 | 1.28 | 0.03 % |
| 1999 | 1.28 | 0.00 % |
| 2000 | 1.42 | 10.76 % |
| 2001 | 1.41 | -0.70 % |
| 2002 | 1.41 | 0.01 % |
| 2003 | 1.41 | 0.06 % |
| 2004 | 1.40 | -0.23 % |
| 2005 | 1.69 | 20.43 % |
| 2006 | 1.33 | -21.16 % |
| 2007 | 1.57 | 17.81 % |
| 2008 | 1.04 | -33.86 % |
| 2009 | 1.07 | 2.63 % |
| 2010 | 1.07 | 0.00 % |
|
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