Year % of female population 1960 3.62736679138756 1961 3.57447850156477 1962 3.56035562902764 1963 3.53736121919515 1964 3.50079401889468 1965 3.44575913748059 1966 3.36765042804918 1967 3.26856411218421 1968 3.16483098908805 1969 3.08815571234895 1970 3.08927412029908 1971 3.15615420313078 1972 3.24658948085535 1973 3.35169274290442 1974 3.4594992471979 1975 3.56569528302103 1976 3.66840806175587 1977 3.76332018897574 1978 3.85021938829533 1979 3.93132432248632 1980 4.00267041613585 1981 4.06090530636747 1982 4.10496432048281 1983 4.12572199410165 1984 4.11419659883925 1985 4.07110878377833 1986 4.00039525536079 1987 3.90777672865354 1988 3.80502197949177 1989 3.70445500301555 1990 3.61330393135339 1991 3.53306013597708 1992 3.46154017205958 1993 3.38738108820643 1994 3.29978074306329 1995 3.23251660695649 1996 3.1973698600175 1997 3.1784304477066 1998 3.18668327718102 1999 3.22766925863348 2000 3.27269823174251 2001 3.3101145046471 2002 3.35164495464695 2003 3.39304536685714 2004 3.43254911985517 2005 3.46867251320326 2006 3.50141196908764 2007 3.52962656122082 2008 3.55133462492806 2009 3.56627057438961 2010 3.57512924736889 2011 3.57822399408296 2012 3.57653049538819 2013 3.57133654331351 2014 3.5625182980105 2015 3.54833075925665 2016 3.52740608948805 2017 3.50414085613112 2018 3.4855327471226 2019 3.47488872245183 2020 3.47435612800777 2021 3.48494244234243 2022 3.50413531159928 2023 3.52872726927689