|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.78 | NA |
| 1987 | 2.36 | -37.45 % |
| 1988 | | NA |
| 1989 | 2.42 | NA |
| 1990 | 2.49 | 2.90 % |
| 1991 | 2.28 | -8.71 % |
| 1992 | 1.75 | -23.31 % |
| 1993 | 1.78 | 1.94 % |
| 1994 | 2.35 | 31.89 % |
| 1995 | 1.95 | -16.98 % |
| 1996 | 1.94 | -0.25 % |
| 1997 | 2.10 | 7.95 % |
| 1998 | 2.12 | 1.23 % |
| 1999 | 2.17 | 2.20 % |
| 2000 | 2.17 | -0.15 % |
| 2001 | 2.20 | 1.60 % |
| 2002 | 8.53 | 287.20 % |
| 2003 | 2.16 | -74.70 % |
| 2004 | 2.17 | 0.47 % |
| 2005 | 2.22 | 2.38 % |
| 2006 | 2.19 | -1.37 % |
| 2007 | 2.92 | 33.60 % |
| 2008 | 2.80 | -4.35 % |
| 2009 | 3.17 | 13.26 % |
| 2010 | 2.19 | -30.97 % |
|
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