Year % of total population 1960 50.5046085853905 1961 50.4049516507904 1962 50.2840093292337 1963 50.1559074631337 1964 50.076445009233 1965 50.0254226924884 1966 50.0093992029476 1967 49.8947690425207 1968 49.6895601102721 1969 49.5688083108816 1970 49.5548309513899 1971 49.6396657736521 1972 49.8238598495668 1973 50.096291268672 1974 50.3996956769829 1975 50.692683761781 1976 50.9884587628594 1977 51.4105814475153 1978 51.9155326235496 1979 52.3609930988747 1980 52.7665756710924 1981 53.1449576903418 1982 53.5220930352519 1983 53.8940617234304 1984 54.2188667577108 1985 54.4616684440186 1986 54.613066879555 1987 54.8196977164449 1988 55.0830368037084 1989 55.2533810397491 1990 55.3202264831302 1991 55.3153990273661 1992 55.2677046760796 1993 55.2097415357091 1994 55.1721371883507 1995 55.1419583602146 1996 55.1564449323819 1997 55.386556458503 1998 55.7645816681961 1999 56.0868584652194 2000 56.3202651007529 2001 56.4434475508553 2002 56.4511001502832 2003 56.3530487834078 2004 56.1997791233482 2005 56.0612873756905 2006 55.9676052358979 2007 56.0351658656664 2008 56.2595855309917 2009 56.4940640633167 2010 56.6837549530421 2011 56.7630482155552 2012 56.8221986567692 2013 56.9362866400844 2014 57.0599903400219 2015 57.2482614349522 2016 57.490717309557 2017 57.7441540577717 2018 58.0382404268168 2019 58.3656104544523 2020 58.744085735459 2021 59.1782449984436 2022 59.5288117352549 2023 59.7617213958969