|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | .61 | NA |
| 1990 | .71 | 15.79 % |
| 1991 | .77 | 8.95 % |
| 1992 | .82 | 5.40 % |
| 1993 | .78 | -4.74 % |
| 1994 | .74 | -5.26 % |
| 1995 | 1.21 | 63.89 % |
| 1996 | .84 | -30.70 % |
| 1997 | 1.47 | 76.09 % |
| 1998 | 1.29 | -12.50 % |
| 1999 | 1.29 | 0.00 % |
| 2000 | 1.14 | -11.35 % |
| 2001 | 2.02 | 77.27 % |
| 2002 | 1.78 | -12.12 % |
| 2003 | 1.94 | 9.20 % |
| 2004 | 2.04 | 4.98 % |
| 2005 | 2.25 | 10.30 % |
| 2006 | 2.31 | 2.73 % |
| 2007 | 2.48 | 7.51 % |
| 2008 | 1.57 | -36.62 % |
| 2009 | 1.47 | -6.49 % |
| 2010 | 1.47 | -0.14 % |
|
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