|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .92 | NA |
| 1987 | 1.72 | 86.83 % |
| 1988 | 1.38 | -20.05 % |
| 1989 | 1.24 | -9.92 % |
| 1990 | 1.32 | 6.32 % |
| 1991 | 1.38 | 4.80 % |
| 1992 | 1.70 | 23.28 % |
| 1993 | 1.73 | 1.65 % |
| 1994 | 1.78 | 2.70 % |
| 1995 | 1.82 | 2.63 % |
| 1996 | 1.84 | 1.01 % |
| 1997 | 1.85 | 0.27 % |
| 1998 | 1.85 | 0.00 % |
| 1999 | 1.85 | 0.00 % |
| 2000 | 3.22 | 74.21 % |
| 2001 | 3.55 | 10.45 % |
| 2002 | 3.55 | 0.00 % |
| 2003 | 3.55 | 0.00 % |
| 2004 | 3.57 | 0.38 % |
| 2005 | 4.16 | 16.66 % |
| 2006 | 3.62 | -12.92 % |
| 2007 | 2.69 | -25.81 % |
| 2008 | 1.70 | -36.61 % |
| 2009 | 1.79 | 5.27 % |
| 2010 | 1.79 | 0.00 % |
|
|