Year % of total population 1960 59.1346201070674 1961 59.2760607247047 1962 59.3114572040509 1963 59.2472187474732 1964 59.1691214991798 1965 59.0763661840261 1966 58.5995900704379 1967 57.8222335257436 1968 57.1304195901732 1969 56.5312417568812 1970 56.0387201570531 1971 55.7050262362967 1972 55.4812127579245 1973 55.2774935679275 1974 55.0893513944718 1975 54.9153374367471 1976 55.1037781776212 1977 55.6076890697348 1978 56.0691880211335 1979 56.4657791096012 1980 56.764912609531 1981 56.8956902174535 1982 56.9171182409807 1983 56.9358904349469 1984 56.9005493978454 1985 56.847761352056 1986 56.7026558196183 1987 56.4455446656223 1988 56.2059185037431 1989 55.9816163977316 1990 55.7768108431476 1991 55.5237028742068 1992 55.4326611885603 1993 55.8704558717258 1994 56.8506848430266 1995 57.5594089493736 1996 57.8695228959008 1997 58.0526015800457 1998 58.2247530150411 1999 58.3883154977531 2000 58.5461995213192 2001 58.6999679666451 2002 58.8516746411483 2003 59.0029721542551 2004 59.1552003477161 2005 59.0476527051275 2006 58.6020870699909 2007 58.1049151317892 2008 57.6616885394937 2009 57.2682656364579 2010 56.9295729092913 2011 56.8915890674576 2012 57.096212495909 2013 57.2804522012506 2014 57.8368315050255 2015 59.842051523981 2016 60.8388163786086 2017 60.8002998372811 2018 61.5178640711482 2019 61.6563914345545 2020 61.2566059786572 2021 60.9558943595395 2022 60.8110852677041 2023 60.7014951829513