Year % of total population 1960 49.2925041724113 1961 49.3053814377278 1962 49.3180365134617 1963 49.3305663871314 1964 49.341248949874 1965 49.3501965535576 1966 49.3610003539988 1967 49.372954165052 1968 49.3838537837248 1969 49.3943771097519 1970 49.4062197979691 1971 49.4166083366862 1972 49.4244076831272 1973 49.4316765023689 1974 49.4244449524629 1975 49.4027661528873 1976 49.3796427881892 1977 49.356376565726 1978 49.3311777275199 1979 49.302098093231 1980 49.2720425947625 1981 49.2250076058833 1982 49.1794572755482 1983 49.1503501294052 1984 49.1635527729214 1985 49.2192373924889 1986 49.2752367882292 1987 49.3305653989441 1988 49.3877733684277 1989 49.4458514881988 1990 49.500872560099 1991 49.5510070731383 1992 49.5904722699334 1993 49.6081944074727 1994 49.5939071982167 1995 49.5529140888214 1996 49.5040146356337 1997 49.4571002929381 1998 49.4113283620498 1999 49.3663797825849 2000 49.3247835363075 2001 49.2867276938914 2002 49.2515222802441 2003 49.2496442154768 2004 49.2786676797593 2005 49.3075631426286 2006 49.3372266834337 2007 49.3708648108685 2008 49.4080334318022 2009 49.4438850786345 2010 49.4799137964409 2011 49.5165678116236 2012 49.5483776432377 2013 49.5791975881807 2014 49.6085689525765 2015 49.6349305611342 2016 49.6591153311359 2017 49.6798648738316 2018 49.6996624832919 2019 49.7170254651174 2020 49.729428378843 2021 49.7409387268383 2022 49.7538425834223 2023 49.7660076850735