Year % of female population 1960 8.42616482063493 1961 8.1782479624445 1962 7.82997126340251 1963 7.41844741219453 1964 7.01157301886457 1965 6.69223189822406 1966 6.56378984670361 1967 6.63884162762252 1968 6.84737713429543 1969 7.14886325996084 1970 7.52332785421933 1971 7.85175554000494 1972 8.10078799946763 1973 8.27580750982256 1974 8.25672072335717 1975 8.12009682955935 1976 7.97771436230303 1977 7.79301356694197 1978 7.56364422327124 1979 7.26992360675657 1980 6.90258216687418 1981 6.52137339804416 1982 6.22694585250402 1983 6.03819146353919 1984 5.89555851877872 1985 5.75825351767588 1986 5.6244701408512 1987 5.97930322645205 1988 6.81282443662102 1989 7.542623778279 1990 8.1233041965955 1991 8.62463839720838 1992 8.60117910630411 1993 8.08328542145249 1994 7.77016811824089 1995 7.71652957690449 1996 7.75675134182699 1997 7.86428562795901 1998 7.98461891805742 1999 8.01491890447371 2000 7.96422587275553 2001 7.89272261253196 2002 7.71329051595982 2003 7.42310143301287 2004 7.14792091086787 2005 6.94317531637726 2006 6.82399902662084 2007 6.83222778343498 2008 6.92522172431988 2009 6.98144362485031 2010 6.88360682076168 2011 6.63866139251369 2012 6.31626776992924 2013 5.9602278556883 2014 5.62811898952144 2015 5.3550496283154 2016 5.17812622782412 2017 5.07697227251924 2018 5.01259534013945 2019 4.98458750594764 2020 4.99137969945377 2021 5.02255678711661 2022 5.38679030806818 2023 5.61808271301092