Year | Value | 2021 | 666.85837754375 | 2020 | 682.54312438598 | 2019 | 653.22121246321 | 2018 | 678.91777156956 | 2017 | 615.0970087113 | 2016 | 576.22852004204 | 2015 | 544.87166556948 | 2014 | 656.08279265515 | 2013 | 658.7496037491 | 2012 | 631.1646560964 | 2011 | 602.8918517551 | 2010 | 538.39328382894 | 2009 | 538.93611700964 | 2008 | 566.81969375284 | 2007 | 474.62912358602 | 2006 | 419.95028927404 | 2005 | 406.49021413424 | 2004 | 373.42932859787 | 2003 | 336.34908358087 | 2002 | 265.2923957897 | 2001 | 243.01375538352 | 2000 | 233.75457501546 | 1999 | 269.18789447486 | 1998 | 228.81293104132 | 1997 | 206.30170726487 | 1996 | 225.04013662251 | 1995 | 210.65654751153 | 1994 | 170.69910021446 | 1993 | 298.98850446243 | 1992 | 322.15377303042 | 1991 | 308.73081299118 | 1990 | 313.13367979088 | 1989 | 271.09361094727 | 1988 | 278.54036773771 | 1987 | 259.44196177958 | 1986 | 230.46558806794 | 1985 | 180.70687490385 | 1984 | 175.16198725173 | 1983 | 198.02872698038 | 1982 | 224.77593714447 | 1981 | 234.68966132429 | 1980 | 263.01984056375 |
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