Year % of female population 1960 0.369024231440273 1961 0.376513872296924 1962 0.382268439482447 1963 0.385773642377959 1964 0.390810524309965 1965 0.391909760361368 1966 0.39021326012227 1967 0.389223648979143 1968 0.38718400875691 1969 0.384072863653422 1970 0.380415014426649 1971 0.377147006647775 1972 0.367482461745555 1973 0.359380585922065 1974 0.361176639739282 1975 0.363441575791097 1976 0.366301486381357 1977 0.372081222062193 1978 0.378712788007251 1979 0.382999966183629 1980 0.392009296311293 1981 0.397160476147231 1982 0.395727355234254 1983 0.396038329050135 1984 0.396160589263013 1985 0.396414769136412 1986 0.395938587397827 1987 0.395293548700207 1988 0.391591711719242 1989 0.384634321923223 1990 0.376479883487684 1991 0.367119192548845 1992 0.358148578771944 1993 0.337489350526909 1994 0.337339801008252 1995 0.34420388765687 1996 0.325078535056861 1997 0.313906694582775 1998 0.314193768318999 1999 0.316027102423119 2000 0.316409643686266 2001 0.318048849451394 2002 0.320161553703744 2003 0.322628193598179 2004 0.32580354972545 2005 0.32723495477766 2006 0.327049837197046 2007 0.326499114273073 2008 0.32734486702376 2009 0.331063064384958 2010 0.331054332189766 2011 0.326394970379808 2012 0.323671437482508 2013 0.32287323287238 2014 0.322768319946389 2015 0.320349315292059 2016 0.318853992621549 2017 0.322528853924049 2018 0.329964743540475 2019 0.33822919592814 2020 0.342147781938377 2021 0.342689297621446 2022 0.343299453661393 2023 0.345845290417671