Year % of female population 1960 24.3295181390016 1961 23.8352791832867 1962 23.200649459037 1963 22.6673858609351 1964 22.2939958350977 1965 21.9396715471349 1966 21.5270252415083 1967 21.1003945001165 1968 20.7162150770133 1969 20.3977553418595 1970 20.1541203141715 1971 19.9927875205937 1972 19.9447000201393 1973 20.0791122031151 1974 20.442170346927 1975 20.9147432325992 1976 21.3512204202324 1977 21.719830102054 1978 21.9877261263304 1979 22.1409220020765 1980 22.2191796478538 1981 22.2599450756345 1982 22.2835955310821 1983 22.2904633879365 1984 22.2625250856106 1985 22.1805709512166 1986 22.0286516239153 1987 21.7823341052918 1988 21.409686555003 1989 20.9040040201422 1990 20.325374089851 1991 19.7809170071194 1992 19.2653647938204 1993 18.7529584193222 1994 18.2298003401653 1995 17.7218684591348 1996 17.2633779225485 1997 16.8262967179299 1998 16.417718003744 1999 16.027316565786 2000 15.6332578421296 2001 15.254361010154 2002 14.9129052804187 2003 14.5822962713212 2004 14.269745976286 2005 13.9912719810275 2006 13.7482121087175 2007 13.6003916562368 2008 13.5498918475959 2009 13.595111540914 2010 13.7633393723171 2011 13.952826845717 2012 14.1141905412592 2013 14.2780669314492 2014 14.4510584636964 2015 14.6284626165269 2016 14.7926714984246 2017 14.9454204117062 2018 15.0970752406141 2019 15.2407262361364 2020 15.3422444616264 2021 15.3819548201252 2022 15.3379632394619 2023 15.1968670458946