Year % of total population 1960 48.7971229361573 1961 48.7694444397339 1962 48.7343510014046 1963 48.6913639873283 1964 48.642928497655 1965 48.592712966386 1966 48.5424899634856 1967 48.4917064606182 1968 48.4408776997685 1969 48.3902329366461 1970 48.340517677099 1971 48.2931293340229 1972 48.2494701998354 1973 48.2091987259347 1974 48.1742457411702 1975 48.1481607261854 1976 48.1315688615693 1977 48.122041448107 1978 48.1214224755887 1979 48.1304281451957 1980 48.1495595500622 1981 48.182539101701 1982 48.2309985699625 1983 48.2942675485142 1984 48.3719201488253 1985 48.463974651018 1986 48.5683764414766 1987 48.6840252082049 1988 48.812280896924 1989 48.9545978864061 1990 49.1086673225969 1991 49.2693546887554 1992 49.4345648975297 1993 49.6012828751139 1994 49.7633120107201 1995 49.9171833572649 1996 50.0582790307676 1997 50.1863867162469 1998 50.2930070308693 1999 50.3711357558303 2000 50.4216974055168 2001 50.4394009155216 2002 50.4255893372639 2003 50.3856946237477 2004 50.3278236752691 2005 50.260169872131 2006 50.188603733052 2007 50.1140424799838 2008 50.0400618086797 2009 49.9732984455771 2010 49.917536183681 2011 49.8769932573826 2012 49.8522055754924 2013 49.8405965471591 2014 49.8376964476291 2015 49.8424100627203 2016 49.8565633587325 2017 49.8785318239675 2018 49.9060657702972 2019 49.9393329512719 2020 49.9880530854607 2021 50.0490417590578 2022 50.1177382850143 2023 50.1883712235286