Year % of total population 1960 49.7517836677391 1961 49.750556933925 1962 49.7595835758278 1963 49.7975611273271 1964 49.8315479370412 1965 49.8446357449221 1966 49.8572842052246 1967 49.9111257237089 1968 50.0015781345289 1969 50.0592172130442 1970 50.0611707749939 1971 50.0585419073961 1972 50.0646723348253 1973 50.0686765719286 1974 50.0795974250134 1975 50.0927496940649 1976 50.1118993085262 1977 50.1433858805657 1978 50.185919256832 1979 50.2353670073784 1980 50.2734204211532 1981 50.3052247310814 1982 50.3405979368564 1983 50.3709050206735 1984 50.4094956219965 1985 50.451909155551 1986 50.4923558760156 1987 50.5447877676582 1988 50.6193301451567 1989 50.7000964378006 1990 50.7590976482234 1991 50.7845102207348 1992 50.7740980132555 1993 50.7512293836544 1994 50.7316157077404 1995 50.7061310713186 1996 50.6923641602947 1997 50.7225124289829 1998 50.7857389573454 1999 50.8507643418772 2000 50.9083419924851 2001 50.9459249959957 2002 50.9544180901305 2003 50.9566682695094 2004 50.9767092687844 2005 51.0118731188514 2006 51.0465844557077 2007 51.0723217893949 2008 51.0840354261815 2009 51.0870146222791 2010 51.0934722518129 2011 51.1031164715063 2012 51.1058471517934 2013 51.0780911706261 2014 51.0187973714029 2015 50.9535375627098 2016 50.8912977302665 2017 50.8340265118666 2018 50.7374353263783 2019 50.5603107379381 2020 50.4487829108621 2021 50.4386880627371 2022 50.4305257490037 2023 50.4232704041621