|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | 7.60 | NA |
| 1988 | 6.40 | -15.78 % |
| 1989 | 6.58 | 2.86 % |
| 1990 | 45.30 | 588.11 % |
| 1991 | 47.12 | 4.03 % |
| 1992 | 43.92 | -6.80 % |
| 1993 | 45.54 | 3.69 % |
| 1994 | 45.49 | -0.11 % |
| 1995 | 52.19 | 14.73 % |
| 1996 | 55.14 | 5.65 % |
| 1997 | 61.18 | 10.97 % |
| 1998 | 67.28 | 9.97 % |
| 1999 | 63.22 | -6.04 % |
| 2000 | 2.37 | -96.26 % |
| 2001 | 4.91 | 107.71 % |
| 2002 | 4.10 | -16.54 % |
| 2003 | 3.71 | -9.62 % |
| 2004 | 1.88 | -49.28 % |
| 2005 | 1.06 | -43.67 % |
| 2006 | .87 | -18.00 % |
| 2007 | .42 | -51.22 % |
| 2008 | .38 | -10.00 % |
| 2009 | .38 | 0.00 % |
| 2010 | .40 | 5.55 % |
|
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