Year % of female population 1960 1.7967581481095 1961 1.82159948264712 1962 1.85266166974366 1963 1.88701154454579 1964 1.91824799226538 1965 1.93991594100336 1966 1.92391848234476 1967 1.85342828865865 1968 1.75810975206275 1969 1.69936397778543 1970 1.67549455914133 1971 1.68311277401675 1972 1.72605524628866 1973 1.78014061096064 1974 1.80165618669056 1975 1.75929616300381 1976 1.67121181310952 1977 1.55216727186251 1978 1.41803499987728 1979 1.34514451278885 1980 1.35440631249875 1981 1.38519928481998 1982 1.41592337222209 1983 1.44527892318337 1984 1.47204090298082 1985 1.4955481131861 1986 1.51780022896516 1987 1.54101718677527 1988 1.56610090354756 1989 1.59364817949383 1990 1.62391169698722 1991 1.62703869938845 1992 1.60260287241753 1993 1.57765736922475 1994 1.55008525111059 1995 1.519569298277 1996 1.48610480463609 1997 1.44907221271413 1998 1.41018341283503 1999 1.37088187714693 2000 1.3320674149111 2001 1.2945435918928 2002 1.25757938180341 2003 1.22095453475655 2004 1.185609573108 2005 1.15275674940034 2006 1.12385598865072 2007 1.10046047732752 2008 1.08433520771241 2009 1.07810290871407 2010 1.08170172378604 2011 1.09434692170309 2012 1.11758310541993 2013 1.15135407438289 2014 1.19404315731622 2015 1.24525710663697 2016 1.30271370952372 2017 1.36155378486056 2018 1.41800016083371 2019 1.46879180384335 2020 1.50736078932886 2021 1.53176074863082 2022 1.54639344546875 2023 1.55610483029387