Year % of total population 1960 52.0046675422859 1961 51.9695060942534 1962 51.9033309742317 1963 51.6678100458511 1964 51.6517754558603 1965 51.7653667225334 1966 51.9313792586754 1967 52.0850708796751 1968 52.1478064799605 1969 52.1073148253329 1970 52.0516193662107 1971 52.0729002960718 1972 51.4637022380315 1973 50.9312884122695 1974 51.1505090665874 1975 51.2305053408271 1976 51.1777422942821 1977 51.2344847569453 1978 51.3686220721123 1979 51.2628228538586 1980 51.7235242854786 1981 52.0050633041054 1982 51.6262567299648 1983 51.3274659259362 1984 50.9442682643753 1985 50.4905998839132 1986 49.9702035352918 1987 49.6574536061477 1988 49.3463808979769 1989 48.9503595011033 1990 48.6602476916755 1991 48.451860499388 1992 48.5546182931299 1993 46.4577100456868 1994 46.3204131957053 1995 48.3843501439375 1996 47.9020215221078 1997 47.5949726715443 1998 48.1641299413123 1999 48.8817316000505 2000 49.370483615991 2001 49.9265357394348 2002 50.4633145924958 2003 50.9892220288868 2004 51.5799601600787 2005 51.9975268222515 2006 52.2277034278141 2007 52.3735873991038 2008 52.5973685536153 2009 52.8298500717504 2010 52.7937577667842 2011 52.5199421345759 2012 52.2109842714175 2013 51.8877854767846 2014 51.5691912629095 2015 50.9225680990619 2016 50.1986893450646 2017 49.919264713225 2018 50.0688934523487 2019 50.450978783879 2020 50.812998433376 2021 51.2303551855904 2022 51.7465760027104 2023 52.3570427869076