Year % of female population 1960 20.5001116461039 1961 20.7880621218736 1962 21.0477127549651 1963 21.2550211835952 1964 21.4231361536371 1965 21.5749037781089 1966 21.7162618721353 1967 21.7680956468496 1968 21.7032750805288 1969 21.549702170152 1970 21.3392387351184 1971 21.0579349426851 1972 20.6754366507988 1973 20.3335730096293 1974 20.0404756306473 1975 19.7200437969998 1976 19.3693643978942 1977 19.0057823092002 1978 18.7043077574369 1979 18.3578761166944 1980 17.9450733403373 1981 17.5750271182355 1982 17.2339482370032 1983 16.9104777026793 1984 16.6019055730026 1985 16.3099217251293 1986 16.1131334723119 1987 16.0641841228749 1988 16.1786462989393 1989 16.4120206415056 1990 16.6449403361539 1991 16.8664222478732 1992 17.101448547182 1993 17.3300091786361 1994 17.545684620694 1995 17.6984615384615 1996 17.7890796879911 1997 17.8934762559054 1998 17.9982128146773 1999 18.1263951117354 2000 18.2050457323288 2001 18.2042892518393 2002 18.1686654233891 2003 18.0624056366381 2004 17.9472605936965 2005 17.8284450731109 2006 17.7149796755641 2007 17.5969592745226 2008 17.4349665797659 2009 17.2417853258429 2010 17.0780710136027 2011 16.8379182070329 2012 16.5938396022343 2013 16.4771753729487 2014 16.33013311238 2015 16.1569883268071 2016 15.9473431423687 2017 15.7930836900468 2018 15.7592819878324 2019 15.7221346002817 2020 15.7067277145056 2021 15.6609337924671 2022 15.5423428464839 2023 15.4273686929409