|
| year | consumption | change |
| 1980 | .97 | NA |
| 1981 | 1.03 | 6.19 % |
| 1982 | .25 | -75.73 % |
| 1983 | .22 | -12.00 % |
| 1984 | .02 | -90.91 % |
| 1985 | .42 | 2,000.00 % |
| 1986 | .53 | 26.19 % |
| 1987 | .67 | 26.42 % |
| 1988 | .81 | 20.90 % |
| 1989 | .88 | 8.64 % |
| 1990 | 1.01 | 14.77 % |
| 1991 | 1.15 | 13.86 % |
| 1992 | 1.23 | 6.96 % |
| 1993 | 1.42 | 15.45 % |
| 1994 | 1.59 | 11.97 % |
| 1995 | 1.99 | 25.16 % |
| 1996 | 2.72 | 36.68 % |
| 1997 | 2.97 | 9.19 % |
| 1998 | 3.41 | 14.81 % |
| 1999 | 3.65 | 7.04 % |
| 2000 | 4.14 | 13.42 % |
| 2001 | 4.34 | 4.83 % |
| 2002 | 5.07 | 16.82 % |
| 2003 | 5.22 | 2.96 % |
| 2004 | 6.44 | 23.37 % |
| 2005 | 8.64 | 34.16 % |
| 2006 | 9.07 | 4.98 % |
|
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