Year % of total population 1960 50.8865600247305 1961 50.8798709770761 1962 50.8719953881192 1963 50.8640127596293 1964 50.8549670551097 1965 50.8460235338646 1966 50.8390310055031 1967 50.8303731275631 1968 50.8168472957294 1969 50.8014695998813 1970 50.7852070958037 1971 50.7679515434848 1972 50.7509083037613 1973 50.7332311142641 1974 50.7149498969951 1975 50.6996446275492 1976 50.6895959788379 1977 50.6835767139918 1978 50.6811913786884 1979 50.6822849545408 1980 50.6870729216292 1981 50.6949702034594 1982 50.704176392609 1983 50.7145389352193 1984 50.7258896179816 1985 50.7373907243363 1986 50.7489747889466 1987 50.7608342056935 1988 50.7726719217991 1989 50.785751527809 1990 50.8011269896208 1991 50.8179598926908 1992 50.8355523043478 1993 50.854219123168 1994 50.8740664077889 1995 50.8957354287338 1996 50.9184818190235 1997 50.9414555822661 1998 50.9667893003782 1999 50.9937686175385 2000 51.0207816148437 2001 51.0481398009665 2002 51.0761093229276 2003 51.1052760814953 2004 51.1350367202374 2005 51.1648555964011 2006 51.1925548532731 2007 51.2167521964874 2008 51.2392269148197 2009 51.2602398360087 2010 51.2783919364043 2011 51.2930356753133 2012 51.3049596191547 2013 51.3153878082494 2014 51.3252171072628 2015 51.3344157563073 2016 51.3438449231446 2017 51.3553769896422 2018 51.3682706829638 2019 51.380987630843 2020 51.3898980572928 2021 51.3952858512703 2022 51.4005335239797 2023 51.4060078245331