|
| year | consumption | change |
| 1980 | | NA |
| 1981 | 1.10 | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.10 | NA |
| 1987 | 1.10 | 0.00 % |
| 1988 | 1.10 | 0.00 % |
| 1989 | 1.10 | 0.00 % |
| 1990 | 1.10 | 0.00 % |
| 1991 | .57 | -48.00 % |
| 1992 | 1.10 | 92.50 % |
| 1993 | 1.10 | -0.10 % |
| 1994 | 1.10 | 0.00 % |
| 1995 | 1.10 | 0.00 % |
| 1996 | 1.10 | 0.00 % |
| 1997 | 1.10 | 0.00 % |
| 1998 | 1.10 | 0.00 % |
| 1999 | 61.56 | 5,485.01 % |
| 2000 | 148.62 | 141.41 % |
| 2001 | 135.71 | -8.69 % |
| 2002 | 155.01 | 14.22 % |
| 2003 | 185.94 | 19.95 % |
| 2004 | 191.52 | 3.00 % |
| 2005 | 201.72 | 5.33 % |
| 2006 | 144.61 | -28.31 % |
| 2007 | 141.78 | -1.96 % |
| 2008 | 192.88 | 36.04 % |
| 2009 | 189.32 | -1.85 % |
| 2010 | 196.89 | 4.00 % |
| 2011 | 259.52 | 31.80 % |
|
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