Year | Value | 2021 | 1,173.2856533148 | 2020 | 1,058.144904819 | 2019 | 1,002.5932976182 | 2018 | 1,023.0261029672 | 2017 | 937.83573995693 | 2016 | 906.43344230287 | 2015 | 898.79703811027 | 2014 | 1,075.7097587919 | 2013 | 1,038.9628786104 | 2012 | 938.47805658321 | 2011 | 919.35050873656 | 2010 | 835.80378645785 | 2009 | 882.97682651866 | 2008 | 922.4571293434 | 2007 | 792.43226028104 | 2006 | 701.27947704401 | 2005 | 675.79716805524 | 2004 | 652.48422829939 | 2003 | 578.50926311424 | 2002 | 463.44046109913 | 2001 | 408.80524159046 | 2000 | 394.70863427644 | 1999 | 420.97269409594 | 1998 | 271.41672268738 | 1997 | 254.88616269884 | 1996 | 268.46714634746 | 1995 | 254.31699438888 | 1994 | 193.15725344464 | 1993 | 311.33062514188 | 1992 | 231.78272317203 | 1991 | 299.32191013937 | 1990 | 303.8748207677 | 1989 | 238.73349845203 | 1988 | 275.28867935498 | 1987 | 273.31581687874 | 1986 | 240.01701175959 | 1985 | 195.32097087239 | 1984 | 194.52387933927 | 1983 | 212.57348869627 | 1982 | 251.91285953707 | 1981 | 279.44408826926 | 1980 | 310.56186015239 | 1979 | 270.77970622656 | 1978 | 210.4879769838 | 1977 | 171.37346851884 | 1976 | 171.93078360878 | 1975 | 170.95944505412 |
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