|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.30 | NA |
| 1987 | 1.92 | -41.82 % |
| 1988 | 2.33 | 21.30 % |
| 1989 | 5.57 | 138.97 % |
| 1990 | 5.63 | 1.09 % |
| 1991 | .69 | -87.81 % |
| 1992 | 3.47 | 406.16 % |
| 1993 | 8.10 | 133.40 % |
| 1994 | .88 | -89.17 % |
| 1995 | 1.83 | 108.06 % |
| 1996 | 2.78 | 51.95 % |
| 1997 | 3.16 | 13.90 % |
| 1998 | 2.98 | -5.64 % |
| 1999 | 6.94 | 132.56 % |
| 2000 | .52 | -92.55 % |
| 2001 | .52 | 1.38 % |
| 2002 | .43 | -18.82 % |
| 2003 | .43 | 1.89 % |
| 2004 | 1.11 | 156.25 % |
| 2005 | 2.71 | 144.16 % |
| 2006 | .30 | -89.06 % |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | .18 | NA |
| 2010 | | NA |
|
|
