Year % of female population 1960 17.5448157139469 1961 17.7231281530548 1962 17.8899150144521 1963 18.0438434357028 1964 18.1673047961166 1965 18.2522006124819 1966 18.3140249486524 1967 18.3625661577282 1968 18.4037401705666 1969 18.4388429194513 1970 18.4662097904963 1971 18.4816827827827 1972 18.4900369047726 1973 18.4980057435052 1974 18.5145523950011 1975 18.5471538728322 1976 18.5938335558815 1977 18.6414077976118 1978 18.7036356548071 1979 18.7882161229964 1980 18.8817450080919 1981 18.9643539988504 1982 19.0107853294075 1983 19.0075779710279 1984 18.9397178337978 1985 18.8078388017291 1986 18.6407551947944 1987 18.4188980888953 1988 18.2336481329982 1989 18.1266759708167 1990 18.0303294579185 1991 17.9637066790082 1992 17.9515976436772 1993 17.9447807322232 1994 17.9237372199461 1995 17.9021153233127 1996 17.8735206736869 1997 17.8672533628686 1998 17.9079794814504 1999 17.9489919520635 2000 17.956274880581 2001 17.9752462312382 2002 18.0145848326644 2003 18.0662053352814 2004 18.1301604479897 2005 18.2111468433647 2006 18.2828657095772 2007 18.3020833848427 2008 18.2727246197725 2009 18.1777509242486 2010 17.9870525207773 2011 17.7242226451157 2012 17.4199937342765 2013 17.0982782073365 2014 16.7664860131238 2015 16.4197958514189 2016 16.0622380651377 2017 15.7183422698 2018 15.4121291359734 2019 15.151033689573 2020 14.9439610873479 2021 14.7889624972918 2022 14.6648826475147 2023 14.5504630136865