|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .35 | NA |
| 1987 | .36 | 1.53 % |
| 1988 | .33 | -8.43 % |
| 1989 | .34 | 4.85 % |
| 1990 | .31 | -9.68 % |
| 1991 | .45 | 44.62 % |
| 1992 | .32 | -28.32 % |
| 1993 | .33 | 2.13 % |
| 1994 | .35 | 7.14 % |
| 1995 | .37 | 6.67 % |
| 1996 | .47 | 24.66 % |
| 1997 | .75 | 60.44 % |
| 1998 | .86 | 15.63 % |
| 1999 | .93 | 8.11 % |
| 2000 | .98 | 4.71 % |
| 2001 | 1.05 | 7.44 % |
| 2002 | 1.16 | 10.53 % |
| 2003 | 1.19 | 2.54 % |
| 2004 | 1.24 | 3.64 % |
| 2005 | 1.26 | 2.17 % |
| 2006 | 1.52 | 20.37 % |
| 2007 | 1.40 | -7.69 % |
| 2008 | 1.47 | 5.00 % |
| 2009 | 2.69 | 82.54 % |
| 2010 | 3.11 | 15.65 % |
|
|