Year % of female population 1960 4.57731623007972 1961 4.69017476212999 1962 4.84289952577849 1963 5.00947757428645 1964 5.14730595061204 1965 5.24403544209039 1966 5.30448905781692 1967 5.32699530755372 1968 5.32375752274387 1969 5.31634564709774 1970 5.31223715444571 1971 5.30919775472291 1972 5.30628369667394 1973 5.2978068771156 1974 5.24917241654369 1975 5.15969882140496 1976 5.05553080572424 1977 4.93665250194601 1978 4.81161332893434 1979 4.69398844307869 1980 4.58872392489932 1981 4.49585808386171 1982 4.41962913635898 1983 4.35654235293827 1984 4.30468472378899 1985 4.25617576855606 1986 4.19519085983949 1987 4.10591230865848 1988 3.96205638283325 1989 3.75005441170069 1990 3.53234005992371 1991 3.35700552290111 1992 3.23094725819155 1993 3.19381585663414 1994 3.24354515512357 1995 3.30657381024384 1996 3.35728518809251 1997 3.41845802079468 1998 3.48903731721271 1999 3.56746872427867 2000 3.65159593452633 2001 3.73688152924649 2002 3.81887743048746 2003 3.92341746752029 2004 4.04583597271511 2005 4.15412727624837 2006 4.24509422841582 2007 4.31936594163364 2008 4.37925059280298 2009 4.42557610372158 2010 4.45988762793587 2011 4.48453631241719 2012 4.50253170035054 2013 4.5159661426212 2014 4.52597187143611 2015 4.53246057427264 2016 4.5367708485587 2017 4.53896571854682 2018 4.53882560626703 2019 4.53861586741929 2020 4.5417871622196 2021 4.54877594265586 2022 4.55831875245007 2023 4.56907303819435