Year % of female population 1960 0.627661959201973 1961 0.610339566038224 1962 0.593785204656403 1963 0.574176871901352 1964 0.549681261213116 1965 0.525836440809032 1966 0.501860745224602 1967 0.477601196079517 1968 0.461601459256226 1969 0.451208235385867 1970 0.439363736219031 1971 0.422844953704141 1972 0.405481476269219 1973 0.389934106071949 1974 0.378176878728708 1975 0.36951534686529 1976 0.36205846320213 1977 0.35494465708079 1978 0.345650312002936 1979 0.333878204013494 1980 0.320500486523037 1981 0.307372771677869 1982 0.292136614786378 1983 0.274381461069474 1984 0.252429635239177 1985 0.228222838677947 1986 0.21342558382424 1987 0.211529126692529 1988 0.213495968138088 1989 0.214252310190942 1990 0.213213673546175 1991 0.211583084083319 1992 0.210403839627673 1993 0.207140094086525 1994 0.202933336549711 1995 0.19966081014417 1996 0.196132260502132 1997 0.196846642035879 1998 0.2005500207555 1999 0.202878853400877 2000 0.203656386419136 2001 0.203121586960585 2002 0.200505454264126 2003 0.196113425769222 2004 0.194525088447208 2005 0.201238246405465 2006 0.210113631817605 2007 0.235241077825992 2008 0.271755496438534 2009 0.267313670160946 2010 0.238486584828788 2011 0.244324286164958 2012 0.274332620401539 2013 0.285024342082221 2014 0.250518544059805 2015 0.218533407321664 2016 0.242872508739346 2017 0.266019027821371 2018 0.258447461654148 2019 0.248768966304383 2020 0.251724021465086 2021 0.266145538726899 2022 0.283982969120227 2023 0.305137534642985