Year % of total population 1960 47.355634363996636 1961 47.429510134802726 1962 47.50138247056163 1963 47.57098822086483 1964 47.635613013985314 1965 47.69418058429957 1966 47.74137651416626 1967 47.77989955035216 1968 47.810648134970386 1969 47.8385941113098 1970 47.86241099516982 1971 47.91449839859757 1972 48.001432357329556 1973 48.08401784492341 1974 48.162719528705516 1975 48.23228266505462 1976 48.26216919307178 1977 48.26526727731454 1978 48.2717885206697 1979 48.28268738434245 1980 48.30622425022425 1981 48.33566136854342 1982 48.36671843740205 1983 48.39836814261809 1984 48.42661164266864 1985 48.449049326172755 1986 48.46423404644494 1987 48.473356622917855 1988 48.480991915217444 1989 48.50235210881675 1990 48.53284710385501 1991 48.5592568824633 1992 48.575078382109844 1993 48.57573630572901 1994 48.57453039714602 1995 48.57695921391873 1996 48.5780456921333 1997 48.57541163254738 1998 48.569149310671776 1999 48.56277453054302 2000 48.56165145920741 2001 48.563824877696085 2002 48.56735500751097 2003 48.57352871296434 2004 48.58092285140081 2005 48.58765555296174 2006 48.596389138522675 2007 48.60623898428551 2008 48.62096839260165 2009 48.639289825891495 2010 48.663264152787114 2011 48.68818709680295 2012 48.71249968371646 2013 48.73815286497901 2014 48.764330045186504 2015 48.786875064712596 2016 48.806252855752525 2017 48.823631199270736 2018 48.83969375040688 2019 48.85010428573964 2020 48.853417221598235 2021 48.854929638030875 2022 48.86718426870259 2023 48.83811690756601