|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | 6.05 | NA |
| 1991 | 6.89 | 13.92 % |
| 1992 | 2.23 | -67.59 % |
| 1993 | 2.72 | 21.87 % |
| 1994 | 2.58 | -5.06 % |
| 1995 | 2.58 | 0.00 % |
| 1996 | 2.58 | -0.27 % |
| 1997 | 2.58 | 0.27 % |
| 1998 | 2.58 | 0.00 % |
| 1999 | .35 | -86.59 % |
| 2000 | .29 | -16.02 % |
| 2001 | .26 | -12.26 % |
| 2002 | .26 | 0.00 % |
| 2003 | .27 | 7.14 % |
| 2004 | .31 | 13.02 % |
| 2005 | .31 | 0.27 % |
| 2006 | .35 | 11.76 % |
| 2007 | .36 | 5.26 % |
| 2008 | .38 | 5.00 % |
| 2009 | .38 | 0.00 % |
| 2010 | .22 | -42.86 % |
|
|