|
| year | consumption | change |
| 1980 | .10 | NA |
| 1981 | .11 | 10.00 % |
| 1982 | .13 | 18.18 % |
| 1983 | .20 | 53.85 % |
| 1984 | .19 | -5.00 % |
| 1985 | .19 | 0.00 % |
| 1986 | .27 | 42.11 % |
| 1987 | .26 | -3.70 % |
| 1988 | .31 | 19.23 % |
| 1989 | .31 | 0.00 % |
| 1990 | .26 | -16.13 % |
| 1991 | .28 | 7.69 % |
| 1992 | .47 | 67.86 % |
| 1993 | .50 | 6.38 % |
| 1994 | .55 | 10.00 % |
| 1995 | .66 | 20.00 % |
| 1996 | .88 | 33.33 % |
| 1997 | .79 | -10.23 % |
| 1998 | .80 | 1.27 % |
| 1999 | .52 | -35.00 % |
| 2000 | .67 | 28.85 % |
| 2001 | 1.52 | 126.87 % |
| 2002 | 1.53 | 0.66 % |
| 2003 | 1.68 | 9.80 % |
| 2004 | 1.67 | -0.60 % |
| 2005 | .86 | -48.50 % |
| 2006 | 1.07 | 24.42 % |
|
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