|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.66 | NA |
| 1987 | 1.68 | 1.23 % |
| 1988 | .51 | -69.83 % |
| 1989 | 1.78 | 251.69 % |
| 1990 | 1.82 | 2.30 % |
| 1991 | 1.84 | 1.12 % |
| 1992 | 1.83 | -0.27 % |
| 1993 | 1.88 | 2.50 % |
| 1994 | 1.88 | 0.00 % |
| 1995 | 1.90 | 1.09 % |
| 1996 | 1.90 | -0.27 % |
| 1997 | 1.90 | 0.27 % |
| 1998 | 1.94 | 2.15 % |
| 1999 | 1.94 | 0.00 % |
| 2000 | 2.00 | 2.88 % |
| 2001 | 2.00 | 0.27 % |
| 2002 | 2.00 | 0.00 % |
| 2003 | 2.04 | 2.04 % |
| 2004 | 1.94 | -5.26 % |
| 2005 | 2.08 | 7.66 % |
| 2006 | 2.14 | 2.58 % |
| 2007 | 1.76 | -17.81 % |
| 2008 | 1.72 | -2.33 % |
| 2009 | 1.78 | 3.57 % |
| 2010 | 1.76 | -1.15 % |
|
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