Year % of female population 1960 0.42524225194202 1961 0.428138379324354 1962 0.42892950471213 1963 0.427804309237157 1964 0.427771102650589 1965 0.429435739771814 1966 0.431348306889209 1967 0.432825137306583 1968 0.433828175381228 1969 0.436548223350254 1970 0.442108000668735 1971 0.453773693210313 1972 0.469027694408154 1973 0.481944261600719 1974 0.490177008364132 1975 0.491379310344827 1976 0.484043246059659 1977 0.472179619339753 1978 0.463832244103848 1979 0.457815871886454 1980 0.452159615506229 1981 0.447253705318221 1982 0.443049425466296 1983 0.440278138809462 1984 0.437652207673032 1985 0.436643187154435 1986 0.436820212263892 1987 0.437918507539768 1988 0.441997651352527 1989 0.449013430608523 1990 0.457614427708811 1991 0.467055308197304 1992 0.476934562039273 1993 0.486584464493119 1994 0.496801396168508 1995 0.506929510815786 1996 0.516508680513609 1997 0.525446590467345 1998 0.533264328624777 1999 0.54101036339797 2000 0.545690775227371 2001 0.547222587245865 2002 0.549202648448468 2003 0.552550430568941 2004 0.556931503977146 2005 0.561390182179756 2006 0.565999974983426 2007 0.570761606198935 2008 0.575302979631488 2009 0.579934499684945 2010 0.585680167369736 2011 0.59128096678975 2012 0.596241673736845 2013 0.600757499793297 2014 0.604663123607063 2015 0.6079413381728 2016 0.610752702189617 2017 0.614629322556387 2018 0.620266914959653 2019 0.627648032197647 2020 0.637373335365195 2021 0.648963290892415 2022 0.660603375539333 2023 0.672040601016405