|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .77 | NA |
| 1987 | .82 | 6.06 % |
| 1988 | .84 | 2.21 % |
| 1989 | 1.08 | 29.44 % |
| 1990 | .54 | -50.52 % |
| 1991 | .93 | 74.58 % |
| 1992 | .93 | -0.27 % |
| 1993 | .93 | 0.27 % |
| 1994 | .89 | -5.00 % |
| 1995 | .91 | 2.63 % |
| 1996 | .93 | 2.28 % |
| 1997 | .98 | 5.29 % |
| 1998 | 1.24 | 26.19 % |
| 1999 | 1.24 | 0.00 % |
| 2000 | 1.17 | -5.92 % |
| 2001 | 1.22 | 4.28 % |
| 2002 | 2.29 | 88.46 % |
| 2003 | 1.57 | -31.63 % |
| 2004 | 2.17 | 38.43 % |
| 2005 | 1.96 | -9.43 % |
| 2006 | 1.68 | -14.29 % |
| 2007 | 2.50 | 48.61 % |
| 2008 | 2.29 | -8.41 % |
| 2009 | 2.22 | -3.06 % |
| 2010 | 3.62 | 63.16 % |
|
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