|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.15 | NA |
| 1987 | .70 | -38.78 % |
| 1988 | .70 | -0.27 % |
| 1989 | .58 | -16.44 % |
| 1990 | .58 | 0.00 % |
| 1991 | .73 | 25.04 % |
| 1992 | 1.17 | 59.51 % |
| 1993 | 1.17 | 0.27 % |
| 1994 | 1.17 | 0.00 % |
| 1995 | 1.49 | 27.32 % |
| 1996 | 1.71 | 14.94 % |
| 1997 | 1.81 | 5.56 % |
| 1998 | 1.88 | 3.97 % |
| 1999 | 1.88 | 0.00 % |
| 2000 | 2.00 | 6.32 % |
| 2001 | 2.02 | 1.26 % |
| 2002 | 2.03 | 0.63 % |
| 2003 | 2.01 | -1.15 % |
| 2004 | 2.26 | 12.48 % |
| 2005 | 2.03 | -10.06 % |
| 2006 | 2.34 | 15.30 % |
| 2007 | 2.34 | -0.31 % |
| 2008 | 2.34 | 0.01 % |
| 2009 | 2.63 | 12.48 % |
| 2010 | 2.60 | -1.27 % |
|
|