Year % of female population 1960 19.1760904120818 1961 19.278274278528 1962 19.3709239773674 1963 19.4482489031772 1964 19.5020507159713 1965 19.5312236126164 1966 19.5398059725306 1967 19.5307343028024 1968 19.5152062085605 1969 19.513158906505 1970 19.5508023015379 1971 19.6107851034665 1972 19.6654006557673 1973 19.7101393104076 1974 19.7305153178809 1975 19.7306357405545 1976 19.7146384990001 1977 19.6749051904581 1978 19.6097563617947 1979 19.5221068397596 1980 19.3940857560783 1981 19.2429160236018 1982 19.1054061800857 1983 18.9998536741676 1984 18.9344725738586 1985 18.9090083784797 1986 18.8972878649327 1987 18.8667520373481 1988 18.8203446913957 1989 18.7714263852606 1990 18.7142555623225 1991 18.6500009076053 1992 18.5972819725097 1993 18.5638774494698 1994 18.5504275526606 1995 18.5548435708879 1996 18.5604307269393 1997 18.5482002881563 1998 18.5245861544586 1999 18.4875963443839 2000 18.4342219078053 2001 18.3636498715124 2002 18.3029866953986 2003 18.2589320794277 2004 18.2315842430078 2005 18.2235321325623 2006 18.2312774482561 2007 18.2365611610724 2008 18.2166714959112 2009 18.1621531249131 2010 18.0649508620499 2011 17.9312472006862 2012 17.7617330445459 2013 17.5567786133701 2014 17.3146950692211 2015 17.0434286144526 2016 16.7611150861338 2017 16.4827325938731 2018 16.2152671051568 2019 15.9681166543681 2020 15.7475755158082 2021 15.5516441860354 2022 15.3798414659992 2023 15.2261383783858