Year % of total population 1960 50.673375562877 1961 50.6610750951716 1962 50.6460946031976 1963 50.6312521716519 1964 50.6152170805505 1965 50.5966087807808 1966 50.5774054397351 1967 50.5571362352393 1968 50.5362534684179 1969 50.5142776640189 1970 50.4902748614005 1971 50.4656411420254 1972 50.4410276264945 1973 50.4157480404908 1974 50.3886201287855 1975 50.3620477961596 1976 50.3363712029411 1977 50.3096151562375 1978 50.2814369030858 1979 50.2520150150257 1980 50.2226604612761 1981 50.1937407363819 1982 50.1657620497543 1983 50.1394139809366 1984 50.113724954518 1985 50.0887617979745 1986 50.064926572179 1987 50.0425433923086 1988 50.0221485016619 1989 50.00373427557 1990 49.9866970942452 1991 49.9704688448729 1992 49.9540396615339 1993 49.9033135312412 1994 49.8236354263905 1995 49.7510607384762 1996 49.6857010073514 1997 49.6269117539172 1998 49.574788148274 1999 49.530859627361 2000 49.4935442545355 2001 49.4823168860487 2002 49.4953757523524 2003 49.5103660242512 2004 49.524867899507 2005 49.5383469256044 2006 49.5520590007213 2007 49.5656848950567 2008 49.5798986963637 2009 49.5951724535203 2010 49.6112985375521 2011 49.6278656738211 2012 49.6450938943661 2013 49.6630054557476 2014 49.6805299850591 2015 49.6973377571047 2016 49.7140152969698 2017 49.7309482645015 2018 49.7478440635122 2019 49.7644751796144 2020 49.7972966519724 2021 49.8442729947137 2022 49.8829526239538 2023 49.9047710991042