|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .42 | NA |
| 1987 | .52 | 22.60 % |
| 1988 | .42 | -17.82 % |
| 1989 | .48 | 13.95 % |
| 1990 | .35 | -27.08 % |
| 1991 | .42 | 18.33 % |
| 1992 | .45 | 9.03 % |
| 1993 | .64 | 41.99 % |
| 1994 | .79 | 23.24 % |
| 1995 | .78 | -2.41 % |
| 1996 | 1.42 | 83.15 % |
| 1997 | .87 | -38.45 % |
| 1998 | 1.04 | 19.12 % |
| 1999 | 1.24 | 19.05 % |
| 2000 | 1.35 | 8.75 % |
| 2001 | 1.53 | 13.48 % |
| 2002 | 1.65 | 8.05 % |
| 2003 | 1.75 | 5.77 % |
| 2004 | 1.65 | -5.71 % |
| 2005 | 2.48 | 50.41 % |
| 2006 | 3.34 | 34.62 % |
| 2007 | 2.89 | -13.33 % |
| 2008 | 2.48 | -14.29 % |
| 2009 | 1.84 | -25.64 % |
| 2010 | 2.70 | 46.55 % |
|
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