|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 5.83 | NA |
| 1987 | 4.32 | -25.96 % |
| 1988 | 5.09 | 17.85 % |
| 1989 | 3.02 | -40.76 % |
| 1990 | 3.78 | 25.33 % |
| 1991 | 2.24 | -40.71 % |
| 1992 | 2.37 | 5.80 % |
| 1993 | 3.28 | 38.43 % |
| 1994 | 1.31 | -60.15 % |
| 1995 | 1.76 | 34.56 % |
| 1996 | | NA |
| 1997 | 1.37 | NA |
| 1998 | 1.28 | -6.90 % |
| 1999 | 1.84 | 44.31 % |
| 2000 | .06 | -96.56 % |
| 2001 | .23 | 267.68 % |
| 2002 | .06 | -72.73 % |
| 2003 | | NA |
| 2004 | | NA |
| 2005 | | NA |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | .13 | NA |
|
|
