Year % of female population 1960 3.90257263548107 1961 3.7523473947715 1962 3.61514169896695 1963 3.50001491629856 1964 3.41556077893672 1965 3.37048651035149 1966 3.3716407170238 1967 3.42478836438129 1968 3.53072292669652 1969 3.68264788893917 1970 3.8694330970956 1971 4.07681430451587 1972 4.28948267182037 1973 4.49230026392477 1974 4.67164283636016 1975 4.82674811452082 1976 4.98086549323388 1977 5.08610872309206 1978 5.05009748219982 1979 4.95666384769398 1980 4.96759061923864 1981 5.12666626666192 1982 5.36010570015794 1983 5.56914551350402 1984 5.67974230548837 1985 5.6028277214639 1986 5.28956731491352 1987 4.7489701006729 1988 4.04584555219334 1989 3.32807943174347 1990 2.75230097458931 1991 2.43185383150708 1992 2.41569359213589 1993 2.66635076363723 1994 3.0468633389942 1995 3.43183612421445 1996 3.75959273869588 1997 4.00517466355837 1998 4.19968057806995 1999 4.42698854658519 2000 4.72521097263425 2001 5.08189244111325 2002 5.49998835275962 2003 5.97525473985967 2004 6.45624096803428 2005 6.88410392783777 2006 7.2202491964164 2007 7.4379549710618 2008 7.53852770932475 2009 7.56855288822867 2010 7.5495329172028 2011 7.47394225348332 2012 7.36634772527823 2013 7.2458938523315 2014 7.12066401492348 2015 6.99032628813944 2016 6.84879920371486 2017 6.6950481791402 2018 6.53315634166106 2019 6.37478451634443 2020 6.2523932886138 2021 6.1872722427736 2022 6.18518182891476 2023 6.25149691060407