|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .97 | NA |
| 1987 | .94 | -3.14 % |
| 1988 | 1.00 | 5.93 % |
| 1989 | 1.04 | 4.37 % |
| 1990 | 1.04 | 0.00 % |
| 1991 | .86 | -17.23 % |
| 1992 | 1.06 | 22.84 % |
| 1993 | 1.06 | 0.27 % |
| 1994 | 1.00 | -5.56 % |
| 1995 | 1.04 | 3.29 % |
| 1996 | 1.01 | -2.17 % |
| 1997 | 1.14 | 12.85 % |
| 1998 | 1.14 | 0.00 % |
| 1999 | 1.14 | 0.00 % |
| 2000 | 3.06 | 167.13 % |
| 2001 | 3.07 | 0.27 % |
| 2002 | 3.02 | -1.33 % |
| 2003 | 3.19 | 5.41 % |
| 2004 | 2.81 | -11.78 % |
| 2005 | 1.74 | -38.24 % |
| 2006 | 3.41 | 96.47 % |
| 2007 | 5.13 | 50.30 % |
| 2008 | 5.40 | 5.18 % |
| 2009 | 7.99 | 48.11 % |
| 2010 | 9.34 | 16.88 % |
|
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