Year % of total population 1960 49.3930566216154 1961 49.4342600992169 1962 49.4738250123525 1963 49.5105791943289 1964 49.5432218125927 1965 49.575945160487 1966 49.607410361914 1967 49.63553517986 1968 49.662088981784 1969 49.6868733259823 1970 49.7096896493054 1971 49.7305325103979 1972 49.7524876488028 1973 49.7770112018778 1974 49.803410514375 1975 49.829355465657 1976 49.8515199375761 1977 49.8692348863847 1978 49.8830754631244 1979 49.8925960771557 1980 49.8959455311512 1981 49.892457901802 1982 49.8851858199258 1983 49.8728754935183 1984 49.8570441036904 1985 49.8405342386968 1986 49.8224027390436 1987 49.8053238197384 1988 49.7908783942951 1989 49.7739260976768 1990 49.7554954004605 1991 49.7372141444146 1992 49.7178476252587 1993 49.702803657704 1994 49.6902581468702 1995 49.6729896924674 1996 49.6474996905814 1997 49.6199405732105 1998 49.5947591797919 1999 49.5689151765509 2000 49.543642325129 2001 49.5229640919959 2002 49.5092891456797 2003 49.5013314114663 2004 49.4967571740735 2005 49.4941903415115 2006 49.492426381658 2007 49.490579871531 2008 49.4881114625083 2009 49.4854627947795 2010 49.4836849412728 2011 49.4827532676041 2012 49.4810831110514 2013 49.4813377508736 2014 49.4836431151789 2015 49.4859549601839 2016 49.4874039751432 2017 49.4883916742248 2018 49.4916901513161 2019 49.4949829400123 2020 49.4990633263036 2021 49.505808792456 2022 49.5130300231172 2023 49.5195138187161