|
| year | consumption | change |
| 1980 | .00 | NA |
| 1981 | .00 | -20.73 % |
| 1982 | .00 | 19.23 % |
| 1983 | .00 | -7.74 % |
| 1984 | .00 | 0.00 % |
| 1985 | .00 | 23.08 % |
| 1986 | .00 | 0.57 % |
| 1987 | .00 | 11.86 % |
| 1988 | .00 | 22.22 % |
| 1989 | .00 | 0.41 % |
| 1990 | .00 | 0.00 % |
| 1991 | .00 | 0.00 % |
| 1992 | .00 | 3.29 % |
| 1993 | .00 | -8.76 % |
| 1994 | .00 | 21.40 % |
| 1995 | .00 | 1.80 % |
| 1996 | .00 | -0.35 % |
| 1997 | .00 | 4.96 % |
| 1998 | .00 | 0.00 % |
| 1999 | .00 | 0.00 % |
| 2000 | .00 | 59.12 % |
| 2001 | .00 | 4.88 % |
| 2002 | .01 | 2.02 % |
| 2003 | .01 | 9.52 % |
| 2004 | .01 | -3.44 % |
| 2005 | .01 | -0.19 % |
| 2006 | .01 | 3.01 % |
| 2007 | .01 | 5.29 % |
| 2008 | .01 | 4.51 % |
| 2009 | .01 | -2.65 % |
| 2010 | .01 | 0.00 % |
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