Year % of total population 1960 49.3061808792352 1961 49.3072383171669 1962 49.3116230510048 1963 49.3185627659862 1964 49.3266021757232 1965 49.336078523574 1966 49.3478738967881 1967 49.3610142021823 1968 49.3754307141824 1969 49.3922619625878 1970 49.4095476300672 1971 49.4255717707792 1972 49.4417137482924 1973 49.4591387627049 1974 49.4784182570955 1975 49.500042435131 1976 49.5215146219107 1977 49.5423142628409 1978 49.5630801217792 1979 49.5831220755892 1980 49.6025171681154 1981 49.6189673822955 1982 49.6316825447857 1983 49.6433705885081 1984 49.6539865183445 1985 49.6611427276662 1986 49.6665086919988 1987 49.6706702281881 1988 49.6739767122313 1989 49.6774546670964 1990 49.6832387026964 1991 49.6921845063487 1992 49.7044848314228 1993 49.7198405646147 1994 49.7354501232953 1995 49.7488530379015 1996 49.7621057504212 1997 49.7751793665828 1998 49.788962072391 1999 49.8056159678188 2000 49.8224153784868 2001 49.8399549425062 2002 49.8596431569744 2003 49.8798100203265 2004 49.902555479408 2005 49.9272270084882 2006 49.953628043798 2007 49.9803639068269 2008 50.0079710957782 2009 50.0348199862971 2010 50.0612992830791 2011 50.0890693754268 2012 50.1159798372514 2013 50.1411648850607 2014 50.1641447766946 2015 50.1852813556228 2016 50.2047418772191 2017 50.2222075070087 2018 50.2367622717397 2019 50.2483048234073 2020 50.2578950984178 2021 50.2644760237594 2022 50.2698193259823 2023 50.2760443433745