|
| year | consumption | change |
| 1980 | .10 | NA |
| 1981 | .11 | 11.11 % |
| 1982 | .22 | 100.00 % |
| 1983 | .33 | 50.00 % |
| 1984 | .44 | 33.33 % |
| 1985 | 1.10 | 150.00 % |
| 1986 | 2.20 | 100.00 % |
| 1987 | 1.10 | -50.00 % |
| 1988 | 1.10 | 0.00 % |
| 1989 | 1.10 | 0.00 % |
| 1990 | 1.10 | 0.00 % |
| 1991 | 1.10 | 0.00 % |
| 1992 | 1.10 | 0.00 % |
| 1993 | 1.10 | 0.00 % |
| 1994 | 1.10 | 0.00 % |
| 1995 | 25.93 | 2,252.10 % |
| 1996 | 55.92 | 115.69 % |
| 1997 | 105.21 | 88.13 % |
| 1998 | 175.40 | 66.72 % |
| 1999 | 238.52 | 35.98 % |
| 2000 | 261.79 | 9.76 % |
| 2001 | 192.49 | -26.47 % |
| 2002 | 298.46 | 55.06 % |
| 2003 | 306.23 | 2.60 % |
| 2004 | 434.15 | 41.77 % |
| 2005 | 437.57 | 0.79 % |
| 2006 | 468.16 | 6.99 % |
| 2007 | 504.25 | 7.71 % |
| 2008 | 516.11 | 2.35 % |
| 2009 | 550.54 | 6.67 % |
| 2010 | 537.51 | -2.37 % |
| 2011 | 537.51 | 0.00 % |
|
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