Year % of total population 1960 50.0837569183571 1961 50.062445615121 1962 50.0469940684852 1963 50.0340387120418 1964 50.0237882519 1965 50.0101779421128 1966 49.9941332759569 1967 49.9769414848096 1968 49.9598587364305 1969 49.9434092210369 1970 49.9270574573021 1971 49.9124020079988 1972 49.9226623887739 1973 49.956572237816 1974 49.9911580515008 1975 50.023459877376 1976 50.0564637792684 1977 50.0760498794055 1978 50.0795535983435 1979 50.0809358011914 1980 50.0764186436692 1981 50.0732373791707 1982 50.0784965752492 1983 50.0742059344924 1984 50.0600006297763 1985 50.0496953737836 1986 50.0454863176088 1987 50.0472230699957 1988 50.0506226868725 1989 50.0545632899378 1990 50.0586101868664 1991 50.0647968873803 1992 50.0727736537406 1993 50.0816006586177 1994 50.0914621428327 1995 50.0894844056073 1996 50.0747599187869 1997 50.0573746479466 1998 50.0376603551584 1999 50.0159686995743 2000 49.9931586761627 2001 49.970682780635 2002 49.9500389344456 2003 49.9319685232628 2004 49.9264728528916 2005 49.9201758733319 2006 49.8996692572009 2007 49.8763008549423 2008 49.8515125276466 2009 49.8250640852256 2010 49.7990458300073 2011 49.7756194523904 2012 49.7552198179375 2013 49.7366295534783 2014 49.7181914252094 2015 49.6990437669537 2016 49.6826725090283 2017 49.6695870298776 2018 49.6560727516025 2019 49.6430653820329 2020 49.6441145536296 2021 49.6564678126766 2022 49.6706108294013 2023 49.6882852461799