Year % of total population 1960 51.9260843294987 1961 51.8990270526815 1962 51.8950550302279 1963 51.920431128227 1964 51.9506788332014 1965 51.9973897138795 1966 52.0473213760477 1967 52.0732404396675 1968 52.0935058401849 1969 52.1116612999555 1970 52.1121446733499 1971 52.0842655800241 1972 52.035843271301 1973 51.966994841758 1974 51.862510193351 1975 51.7400404857033 1976 51.6052296512531 1977 51.4726719400705 1978 51.352506825136 1979 51.238081405025 1980 51.1359855150231 1981 51.0289141665454 1982 50.9035293286386 1983 50.7827674504063 1984 50.6920245256959 1985 50.6473455966178 1986 50.6198681590839 1987 50.5894377043042 1988 50.5667631033453 1989 50.5482268288504 1990 50.5377786048956 1991 50.5278433287222 1992 50.5098418844789 1993 50.4974136621531 1994 50.4724444808394 1995 50.4311913871714 1996 50.4050416721823 1997 50.381777548034 1998 50.3555568011863 1999 50.329685870353 2000 50.3193791769787 2001 50.3253752943546 2002 50.3290099555472 2003 50.3399939545708 2004 50.3551876476891 2005 50.3751755207114 2006 50.4006595378857 2007 50.4189710275407 2008 50.4176332422998 2009 50.3927797833935 2010 50.3289512961039 2011 50.2258181036945 2012 50.0857162130414 2013 49.9118907491001 2014 49.7107120537764 2015 49.4810317601116 2016 49.2269699917683 2017 48.965269855703 2018 48.7072455277408 2019 48.447784605915 2020 48.2086239080406 2021 47.9872728515343 2022 47.8699984623635 2023 47.8537146958121