| Year | Value | | 2022 | -2.4820611327577 | | 2021 | 0.40172861664246 | | 2020 | 0.1750620581963 | | 2019 | 0.024427107099349 | | 2018 | 0.00020013278283842 | | 2017 | 0.012480098584492 | | 2016 | 0.04298513087435 | | 2015 | 0.066641100965717 | | 2014 | 0.074846229292051 | | 2013 | 0.060360017474465 | | 2012 | 0.00023907600329837 | | 2011 | 0.053769708878101 | | 2010 | 0.28560912153485 | | 2009 | 0.067763227021235 | | 2008 | 0.013637379682709 | | 2007 | 0.054305020803871 | | 2006 | 0.063370574292663 | | 2005 | 0.043948953332248 | | 2004 | 0.058512735127329 | | 2003 | 0.067492701646486 | | 2002 | 0.046318937249939 | | 2001 | 0.027587124728296 | | 2000 | -1.0443353983784 | | 1999 | 0.0083027528251411 | | 1998 | 0.035753301362372 | | 1997 | 0.065455369424731 | | 1996 | 0.076074182364553 | | 1995 | 0.13572103385363 | | 1994 | 0.21101232881934 | | 1993 | 0.25445091393808 | | 1992 | 0.30668139081218 | | 1991 | 0.35467916834788 | | 1990 | 0.39239820520737 | | 1989 | 0.36165550480896 | | 1988 | 0.4144574828677 | | 1987 | 0.56420344904872 | | 1986 | 0.68106557662659 | | 1985 | 0.80358547466946 | | 1984 | 0.90459069212033 | | 1983 | 0.93768892612054 | | 1982 | 0.92028457210658 | | 1981 | 0.90786848811038 | | 1980 | 0.92326747201298 | | 1979 | 0.80218547611655 | | 1978 | 0.79406458327514 | | 1977 | 0.96386672279567 | | 1976 | 0.99779538250044 | | 1975 | 0.99359553240035 | | 1974 | 0.95978577017726 | | 1973 | 0.90811363260292 | | 1972 | 0.82671647501177 | | 1971 | 0.36426016398067 | | 1970 | 0.35575984501832 | | 1969 | 0.78234032889887 | | 1968 | 0.95673206944723 | | 1967 | 0.96172838600662 | | 1966 | 0.74787341883171 | | 1965 | 0.97628938372558 | | 1964 | 1.3822046380536 | | 1963 | 1.3225256471005 | | 1962 | 1.1431540141855 | | 1961 | 1.0957896747412 |
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