Year % of total population 1960 48.1601282839293 1961 48.1940832391765 1962 48.2219959520695 1963 48.2450422684452 1964 48.265862602326 1965 48.2874339233179 1966 48.3051700133594 1967 48.3159934605397 1968 48.3266184578584 1969 48.331944683815 1970 48.303431083217 1971 48.2841993710899 1972 48.3115010007908 1973 48.3396004342752 1974 48.3514817796365 1975 48.3495027346622 1976 48.3374097823773 1977 48.3457941026083 1978 48.3587029711304 1979 48.3518337863999 1980 48.3487110773739 1981 48.3584850823929 1982 48.3784803415719 1983 48.3967096213898 1984 48.4087666958639 1985 48.4174473575505 1986 48.4294774562581 1987 48.445067653709 1988 48.4608599792866 1989 48.4861541250585 1990 48.5205086888818 1991 48.5582148981602 1992 48.5941729680823 1993 48.6275721118974 1994 48.6580301818418 1995 48.6832566455812 1996 48.7088070016731 1997 48.7336532720304 1998 48.7548762560289 1999 48.7768152146621 2000 48.8039605819626 2001 48.8334815599531 2002 48.8650916164224 2003 48.8955184827745 2004 48.9176363070545 2005 48.9357654518972 2006 48.9540471960034 2007 48.9773552576073 2008 49.0126756189598 2009 49.0437672030217 2010 49.069588316533 2011 49.0978191837445 2012 49.1253466335196 2013 49.1551373152374 2014 49.1831092166169 2015 49.2141289079346 2016 49.2590559175167 2017 49.3036850915191 2018 49.3377072197591 2019 49.3659464746863 2020 49.3902306695689 2021 49.4044427809867 2022 49.4122180320516 2023 49.4236472078587