Year | Value | 2022 | 0.32648818106764 | 2021 | 0.51559999884444 | 2020 | 0.48709509171778 | 2019 | -1.1530284238995 | 2018 | 0.19006364011379 | 2017 | 0.14986111697397 | 2016 | 0.16988407330145 | 2015 | 0.096376133139209 | 2014 | 0.91750409596244 | 2013 | 1.1592511168095 | 2012 | 0.269541239521 | 2011 | 0.17197829099572 | 2010 | 0.30759122234095 | 2009 | 0.45561344957773 | 2008 | 0.66246925294153 | 2007 | 0.50493368739767 | 2006 | 0.30055968851778 | 2005 | 0.49138910750321 | 2004 | 0.64718270547077 | 2003 | 0.44450731265555 | 2002 | 0.14891642949075 | 2001 | 0.056167601437478 | 2000 | 0.045303631138613 | 1999 | 0.01682084445537 | 1998 | 0.028774015877437 | 1997 | 0.05290695026061 | 1996 | 0.028104408007276 | 1995 | 0.0015885623091739 | 1994 | 0.020372073945719 | 1993 | 0.061135853002924 | 1992 | 0.067924433080881 | 1991 | 0.069231188953284 | 1990 | 0.083708572958798 | 1989 | 0.075009004535244 | 1988 | 0.048320597047175 | 1987 | 0.010205119554774 | 1986 | 0.0054492818967763 | 1985 | 0.028899939212248 | 1984 | 0.022350913104146 | 1983 | 0.036294636669716 | 1982 | 0.074081859991619 | 1981 | 0.12005432007943 | 1980 | 0.20599975185947 | 1979 | 0.28914720764974 | 1978 | 0.35631295036613 | 1977 | 0.42472205735015 | 1976 | 0.49885105834073 | 1975 | 0.5972472185548 | 1974 | 0.65438893564837 | 1973 | 0.67818764758598 | 1972 | 0.56771249864576 | 1971 | 0.46645287231402 | 1970 | 0.52887703171783 | 1969 | 0.56605850865814 | 1968 | 0.63173725275278 | 1967 | 0.72377817276765 | 1966 | 0.77730440730804 | 1965 | 0.84210861686627 | 1964 | 0.82262369986776 | 1963 | 0.72955324223165 | 1962 | 0.67662298967002 | 1961 | 0.66838287441041 |
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