Year % of total population 1960 50.4566020849562 1961 49.9060359170675 1962 49.3814640548219 1963 48.8701208106498 1964 48.5112698512915 1965 48.1619160208415 1966 47.6651503422602 1967 47.1567164630432 1968 46.6636345693421 1969 46.217431134025 1970 45.8664383821857 1971 45.7796136319622 1972 46.1270041645288 1973 46.7710720186962 1974 47.4510515573634 1975 48.0673279024082 1976 48.6109199275336 1977 49.0902985000644 1978 49.5244256493453 1979 49.9206770680901 1980 50.2641494557994 1981 50.5141709921272 1982 50.606764264422 1983 50.6153384927365 1984 50.6365712310198 1985 50.6661303842484 1986 50.7014341590613 1987 50.7637494151321 1988 50.8974670015667 1989 51.1292023867782 1990 51.4577994057283 1991 51.8726495454098 1992 52.3885492663802 1993 52.9793405625464 1994 53.5935916762025 1995 54.2429423036808 1996 54.9471469396926 1997 55.6768316254506 1998 56.3836614071575 1999 57.0522559675755 2000 57.6871998561655 2001 58.2861691440636 2002 58.8646619284782 2003 59.41675445374 2004 59.9158725932381 2005 60.3508968426258 2006 60.7284115987761 2007 61.0790568471314 2008 61.4205009664627 2009 61.7384505687417 2010 61.9993550590929 2011 62.1760072576061 2012 62.2794942874394 2013 62.3654092991497 2014 62.4550655411015 2015 62.5598355697179 2016 62.6992552973741 2017 62.8530626519668 2018 62.9929691440655 2019 63.1208966350582 2020 63.2807584976763 2021 63.4927521506338 2022 63.7428829302862 2023 64.0172650146102