Year | Value | 2022 | 0.78750246473996 | 2021 | 0.43341448940972 | 2020 | 0.29164117747663 | 2019 | 0.35813091589265 | 2018 | 0.49583892587913 | 2017 | 0.64335090373736 | 2016 | 0.78039264413517 | 2015 | 0.706423849687 | 2014 | 0.50705328301016 | 2013 | 0.4169013607521 | 2012 | 0.37627224261996 | 2011 | 0.41173785519502 | 2010 | 0.44419715450953 | 2009 | 0.53507906207943 | 2008 | 0.58754759025898 | 2007 | 0.44346605432137 | 2006 | 0.32864515891993 | 2005 | 0.27548173340931 | 2004 | 0.25843228205287 | 2003 | 0.27201044403157 | 2002 | 0.319487125341 | 2001 | 0.35831567895549 | 2000 | 0.33423361882926 | 1999 | 0.33088624618654 | 1998 | 0.36316252360076 | 1997 | 0.41556496933145 | 1996 | 0.56592634193459 | 1995 | 0.52096218107871 | 1994 | 0.33770737624332 | 1993 | 0.33316639566195 | 1992 | 0.33067140171355 | 1991 | 0.25951821211507 | 1990 | 0.16245632024247 | 1989 | 0.059987665154673 | 1988 | 0.048593386249855 | 1987 | 0.12666434027904 | 1986 | 0.13372778143502 | 1985 | 0.040526889226038 | 1984 | 0.052376727155228 | 1983 | 0.068666211915763 | 1982 | 0.073481000499298 | 1981 | 0.028405211561393 | 1980 | 0.12160362004559 | 1979 | 0.2456304888368 | 1978 | 0.31059609276327 | 1977 | 0.31144551582758 | 1976 | 0.25135079176554 | 1975 | 0.28826879589183 | 1974 | 0.46559401047814 | 1973 | 0.60448838315148 | 1972 | 0.57199141517023 | 1971 | 0.69489577061886 | 1970 | 0.75142271837547 | 1969 | 0.55299332465181 | 1968 | 0.60883236593599 | 1967 | 0.78841983510981 | 1966 | 0.80300603324249 | 1965 | 0.77923973504915 | 1964 | 0.79921289101395 | 1963 | 0.78772745284145 | 1962 | 0.7784549216491 | 1961 | 0.69814205220441 |
|