Year % of total population 1960 53.41575262541266 1961 53.326208453105046 1962 53.24178857265652 1963 53.16091385982409 1964 53.08747176060302 1965 53.023692480639916 1966 52.966020889744705 1967 52.91669626370364 1968 52.87294652702767 1969 52.83334412168854 1970 52.828848026839786 1971 52.81250587339348 1972 52.7498974947383 1973 52.68643477977156 1974 52.62416341655747 1975 52.56593261194292 1976 52.525676616007566 1977 52.49343722555814 1978 52.458323549770924 1979 52.42845834066403 1980 52.395485334606654 1981 52.35698881611555 1982 52.3166072442905 1983 52.274821458023744 1984 52.23504474419078 1985 52.19732000055294 1986 52.158781661484575 1987 52.11862608305916 1988 52.08062622433314 1989 52.04333070354823 1990 52.010542696650795 1991 51.99131850949153 1992 51.98343251569922 1993 51.98725000093068 1994 51.99998264611012 1995 52.01885078589657 1996 52.037128993065515 1997 52.051545565830295 1998 52.063286545210865 1999 52.07505415921606 2000 52.08352080493975 2001 52.094666851685055 2002 52.11134343698598 2003 52.12885883980518 2004 52.14923882783344 2005 52.17131416971959 2006 52.188284911011266 2007 52.195106603755356 2008 52.19140092890438 2009 52.180901509701584 2010 52.16182005921215 2011 52.138086684685646 2012 52.11348040492305 2013 52.0874038458594 2014 52.06253151093682 2015 52.041356724578826 2016 52.022300154645365 2017 52.003971873703534 2018 51.98585258187626 2019 51.971287463390155 2020 51.96661186670894 2021 51.966765295817225 2022 51.96145026028325 2023 51.969182626746864