Year % of total population 1960 53.14171001707982 1961 52.84172570859308 1962 52.596792438624114 1963 52.38815616020112 1964 52.24928922461987 1965 52.15393151880459 1966 52.06151794326615 1967 51.99262764630402 1968 51.96371473017975 1969 51.962994098772874 1970 51.97375007242093 1971 51.99126127578048 1972 52.01150589180122 1973 52.04605859688279 1974 52.10646112077747 1975 52.139550406619165 1976 52.12249295734251 1977 52.15251249481119 1978 52.231233973451424 1979 52.29777189558852 1980 52.359609988360106 1981 52.546886131062635 1982 52.714962176479105 1983 52.74859865015327 1984 52.790109581028716 1985 52.84175163494813 1986 52.903071216087056 1987 52.979783463401205 1988 53.08509607384293 1989 53.244104643587974 1990 53.57642297335007 1991 53.96679806926875 1992 54.28527770052614 1993 54.55053459484894 1994 54.91607780126036 1995 55.47364604148767 1996 56.11400355306359 1997 56.834892760097766 1998 57.61161948127404 1999 58.408212468008784 2000 59.210449091191556 2001 60.00097714392187 2002 60.71709336405093 2003 61.394380625573234 2004 62.06353694086469 2005 62.670460339014404 2006 63.25083258332553 2007 63.79277708709975 2008 64.17644268699122 2009 64.40812584410028 2010 64.54340654308133 2011 64.532315812659 2012 64.3961743819112 2013 64.1810967405822 2014 63.912562041404726 2015 63.65765259598967 2016 63.49010556133157 2017 63.38375464657685 2018 63.31936407264074 2019 63.32593386856221 2020 63.383526213663465 2021 63.4908959271302 2022 63.65942433617587 2023 63.8696194929097