Year % of total population 1960 50.4536077068185 1961 50.4552238554776 1962 50.4555631026181 1963 50.4543929183441 1964 50.4534285055357 1965 50.4512828750299 1966 50.4476912652849 1967 50.4436004611771 1968 50.4386945825841 1969 50.4339314069965 1970 50.4272218066778 1971 50.420249849534 1972 50.4150099988866 1973 50.4110402720817 1974 50.4088732012426 1975 50.4106978923338 1976 50.4175703165208 1977 50.4254456845816 1978 50.4331510506781 1979 50.4356318394325 1980 50.4302861123426 1981 50.4220683392239 1982 50.4136534929777 1983 50.4082038359064 1984 50.4036258551347 1985 50.3868133728459 1986 50.3574680868981 1987 50.318992432481 1988 50.2738065414367 1989 50.2375164716806 1990 50.2118307894305 1991 50.1625654343846 1992 50.1098371334954 1993 50.0769208289343 1994 50.0442797672954 1995 50.0177359331467 1996 49.9911378123841 1997 49.9570316761353 1998 49.9228235562593 1999 49.897490808624 2000 49.8665895729862 2001 49.825279823223 2002 49.7893306219509 2003 49.7590941651964 2004 49.7316304826975 2005 49.7082300567162 2006 49.6893013707311 2007 49.6757904041511 2008 49.6685051010226 2009 49.666307938561 2010 49.66651292388 2011 49.6660396250061 2012 49.6666588319396 2013 49.6705514871468 2014 49.6762090512288 2015 49.6833146298309 2016 49.6942595396543 2017 49.7043622360682 2018 49.7136159367602 2019 49.7238570279436 2020 49.7345404201184 2021 49.7490161246858 2022 49.764781018993 2023 49.7769844648252