|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.35 | NA |
| 1987 | 1.30 | -3.72 % |
| 1988 | 1.73 | 32.98 % |
| 1989 | 1.99 | 15.14 % |
| 1990 | 2.48 | 24.67 % |
| 1991 | 2.57 | 3.68 % |
| 1992 | 3.09 | 20.24 % |
| 1993 | 3.27 | 5.58 % |
| 1994 | 3.28 | 0.56 % |
| 1995 | 3.78 | 15.00 % |
| 1996 | 3.53 | -6.54 % |
| 1997 | 3.54 | 0.27 % |
| 1998 | 3.56 | 0.52 % |
| 1999 | 3.56 | 0.00 % |
| 2000 | 5.20 | 46.27 % |
| 2001 | 5.24 | 0.62 % |
| 2002 | 3.81 | -27.32 % |
| 2003 | 5.26 | 38.06 % |
| 2004 | 5.26 | 0.00 % |
| 2005 | 5.36 | 2.08 % |
| 2006 | 5.97 | 11.22 % |
| 2007 | 6.17 | 3.36 % |
| 2008 | 5.80 | -5.92 % |
| 2009 | 6.00 | 3.46 % |
| 2010 | 6.00 | 0.00 % |
|
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