Year % of female population 1960 30.0085247899276 1961 30.0861783344939 1962 29.8829500198372 1963 29.6599968102754 1964 29.6030662044749 1965 29.5893338915668 1966 29.1969990989871 1967 28.6153481924947 1968 28.1348789262759 1969 27.6292774694334 1970 27.1401819541402 1971 26.632773476819 1972 26.0437165568155 1973 25.3851554157859 1974 24.72414784247 1975 24.0620922881912 1976 23.4004487587097 1977 22.7959630675525 1978 22.259471907521 1979 21.8001703096719 1980 21.448403979433 1981 21.2047329326451 1982 21.0316100543716 1983 20.8702851450382 1984 20.7063599893392 1985 20.540200287393 1986 20.3985226093614 1987 20.3499522915481 1988 20.3944103656603 1989 20.4840083688333 1990 20.6037704437352 1991 20.7384999568847 1992 20.8550647780674 1993 20.927957409376 1994 20.9385432191879 1995 20.8924691704695 1996 20.8233410786012 1997 20.7633589273812 1998 20.7174797136059 1999 20.6707346677588 2000 20.591053300237 2001 20.4687188104723 2002 20.3340446240283 2003 20.1949886175518 2004 20.031374447519 2005 19.8421218296861 2006 19.6633945623943 2007 19.5184656681073 2008 19.3976050082281 2009 19.2773785733085 2010 19.1464612279302 2011 19.0371003901009 2012 18.9526064862193 2013 18.8628288132542 2014 18.7639272405939 2015 18.6518808002705 2016 18.5415654129222 2017 18.4345990606862 2018 18.3011961079695 2019 18.1383581705015 2020 17.9210235079084 2021 17.6538899476824 2022 17.3732632277878 2023 17.0958273942015