|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.99 | NA |
| 1987 | 3.17 | -36.48 % |
| 1988 | 3.20 | 1.01 % |
| 1989 | 3.29 | 2.83 % |
| 1990 | 3.27 | -0.62 % |
| 1991 | 1.85 | -43.30 % |
| 1992 | 1.53 | -17.55 % |
| 1993 | 1.63 | 6.63 % |
| 1994 | 1.63 | 0.00 % |
| 1995 | 1.63 | 0.00 % |
| 1996 | 1.63 | 0.00 % |
| 1997 | 1.63 | 0.00 % |
| 1998 | 1.63 | 0.00 % |
| 1999 | 1.63 | 0.00 % |
| 2000 | 1.50 | -8.00 % |
| 2001 | 1.50 | 0.00 % |
| 2002 | 1.50 | 0.00 % |
| 2003 | 1.50 | 0.00 % |
| 2004 | 1.50 | 0.00 % |
| 2005 | 1.78 | 18.54 % |
| 2006 | 1.80 | 1.19 % |
| 2007 | 2.17 | 20.40 % |
| 2008 | 2.21 | 1.89 % |
| 2009 | 2.17 | -1.85 % |
| 2010 | 2.17 | 0.00 % |
|
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