|
| year | consumption | change |
| 1980 | 271.00 | NA |
| 1981 | 241.00 | -11.07 % |
| 1982 | 221.00 | -8.30 % |
| 1983 | 208.00 | -5.88 % |
| 1984 | 214.00 | 2.88 % |
| 1985 | 205.00 | -4.21 % |
| 1986 | 223.00 | 8.78 % |
| 1987 | 231.00 | 3.59 % |
| 1988 | 230.00 | -0.43 % |
| 1989 | 228.00 | -0.87 % |
| 1990 | 225.00 | -1.32 % |
| 1991 | 226.00 | 0.44 % |
| 1992 | 225.00 | -0.44 % |
| 1993 | 212.00 | -5.78 % |
| 1994 | 220.00 | 3.77 % |
| 1995 | 203.00 | -7.73 % |
| 1996 | 203.00 | 0.00 % |
| 1997 | 204.00 | 0.49 % |
| 1998 | 210.00 | 2.94 % |
| 1999 | 211.00 | 0.48 % |
| 2000 | 212.82 | 0.86 % |
| 2001 | 211.54 | -0.60 % |
| 2002 | 217.21 | 2.68 % |
| 2003 | 220.37 | 1.46 % |
| 2004 | 219.23 | -0.52 % |
| 2005 | 218.45 | -0.36 % |
| 2006 | 223.36 | 2.25 % |
| 2007 | 227.27 | 1.75 % |
| 2008 | 218.08 | -4.05 % |
| 2009 | 206.61 | -5.26 % |
| 2010 | 214.15 | 3.65 % |
| 2011 | 204.79 | -4.37 % |
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