Year % of total population 1960 52.5350939275088 1961 52.4288470465019 1962 52.3263293018904 1963 52.2302139643001 1964 52.1414414155632 1965 52.0622240099913 1966 51.9895441367594 1967 51.9227302132714 1968 51.8643504063531 1969 51.8101940816564 1970 51.7582106262178 1971 51.7104700833446 1972 51.6660438509619 1973 51.6222455147568 1974 51.5805603722269 1975 51.5396930841659 1976 51.5655370601888 1977 51.6677335831798 1978 51.7735779646286 1979 51.8355277449943 1980 51.8608159722766 1981 51.8853850522609 1982 51.9052391449926 1983 51.9196336126203 1984 51.9246446738894 1985 51.9197549316949 1986 51.9102307605498 1987 51.9010582971209 1988 51.8655513430309 1989 51.8126450392264 1990 51.7654805518054 1991 51.7192214072545 1992 51.6882545296309 1993 51.6674640285981 1994 51.6916137808302 1995 51.7632802785534 1996 51.8360378110682 1997 51.9063667139538 1998 51.9758127499038 1999 51.987699978115 2000 51.9296947121956 2001 51.8596000035257 2002 51.7884045476138 2003 51.7171882610943 2004 51.6230287310996 2005 51.5044008152734 2006 51.3839166355618 2007 51.2619994726534 2008 51.1384495654075 2009 51.0507555790653 2010 50.9979320577811 2011 50.9441699734609 2012 50.8928503656499 2013 50.8435403357312 2014 50.7955651270597 2015 50.7527667719709 2016 50.7204411919191 2017 50.6950705883206 2018 50.6684151977213 2019 50.6379661465492 2020 50.629993278529 2021 50.6522646386228 2022 50.6583173667228 2023 50.6437889832282