Year % of total population 1960 49.222599761667 1961 49.206338280239 1962 49.1920710631826 1963 49.1790929405647 1964 49.1680392526064 1965 49.1590289719801 1966 49.1521076900607 1967 49.1447614945988 1968 49.136492829873 1969 49.1317644744882 1970 49.1298355998202 1971 49.1287931565095 1972 49.1295741916622 1973 49.1320115421833 1974 49.1266044918696 1975 49.1045698882117 1976 49.074954217618 1977 49.0454973911657 1978 49.0202031195404 1979 48.9999250230353 1980 48.9894341434346 1981 48.9892821235493 1982 48.9847491069618 1983 48.9765609112942 1984 48.9711796210412 1985 48.9647717537988 1986 48.9648960741399 1987 48.9668083915105 1988 48.9654143753053 1989 48.963456606653 1990 48.9673296247372 1991 48.9827483057247 1992 49.0065080709345 1993 49.0477279162055 1994 49.0876376988984 1995 49.1486264729606 1996 49.2001803828764 1997 49.2166693358806 1998 49.144183647594 1999 48.934362609947 2000 48.8124770151449 2001 48.8477928062042 2002 48.8958649993091 2003 48.9491932961231 2004 48.9998335227314 2005 49.0315820847453 2006 49.0551520384932 2007 49.0789660744017 2008 49.1135908528205 2009 49.1452672730008 2010 49.1701154515624 2011 49.1914751665591 2012 49.2081402055466 2013 49.2253744804507 2014 49.2368264666722 2015 49.2447917758232 2016 49.2549966763607 2017 49.2668828028107 2018 49.2824001109894 2019 49.2983630471776 2020 49.3132197258166 2021 49.3283451812993 2022 49.3447939648733 2023 49.3617462824438