|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.29 | NA |
| 1987 | .29 | -77.20 % |
| 1988 | 1.74 | 491.83 % |
| 1989 | 1.85 | 6.42 % |
| 1990 | 1.96 | 6.06 % |
| 1991 | 2.14 | 9.01 % |
| 1992 | 2.19 | 2.31 % |
| 1993 | 2.31 | 5.45 % |
| 1994 | 4.54 | 97.09 % |
| 1995 | 1.90 | -58.22 % |
| 1996 | 2.84 | 49.67 % |
| 1997 | 3.27 | 15.09 % |
| 1998 | 3.39 | 3.58 % |
| 1999 | 3.80 | 12.06 % |
| 2000 | 3.67 | -3.37 % |
| 2001 | 3.74 | 2.09 % |
| 2002 | 3.63 | -3.10 % |
| 2003 | 3.10 | -14.70 % |
| 2004 | 2.79 | -10.01 % |
| 2005 | 2.73 | -2.03 % |
| 2006 | 2.95 | 7.96 % |
| 2007 | 3.27 | 11.11 % |
| 2008 | 3.01 | -8.16 % |
| 2009 | 4.06 | 35.08 % |
| 2010 | 4.29 | 5.52 % |
|
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