|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 4.24 | NA |
| 1993 | 2.04 | -51.94 % |
| 1994 | 1.75 | -14.00 % |
| 1995 | 2.24 | 27.98 % |
| 1996 | 2.69 | 20.04 % |
| 1997 | 2.99 | 11.21 % |
| 1998 | 3.28 | 9.37 % |
| 1999 | .59 | -81.91 % |
| 2000 | 1.26 | 113.21 % |
| 2001 | 13.08 | 935.08 % |
| 2002 | 13.69 | 4.69 % |
| 2003 | 14.72 | 7.46 % |
| 2004 | 15.49 | 5.27 % |
| 2005 | 16.76 | 8.19 % |
| 2006 | 16.80 | 0.24 % |
| 2007 | 17.10 | 1.79 % |
| 2008 | 2.64 | -84.58 % |
| 2009 | 16.96 | 543.41 % |
| 2010 | 15.53 | -8.43 % |
|
|