Year % of total population 1960 51.5081437379203 1961 51.5456869268847 1962 51.5813040620601 1963 51.6051338196767 1964 51.5847084502046 1965 51.6035203214923 1966 51.721747686988 1967 51.8594067845211 1968 51.9785444925863 1969 52.0796125021003 1970 52.1615858561045 1971 52.2259385595817 1972 52.2492592393864 1973 52.129632828213 1974 52.1272837225607 1975 52.357951533287 1976 52.5986427813867 1977 52.8220693562252 1978 53.0303794639771 1979 53.2265593909938 1980 53.4150375330777 1981 53.5970745642293 1982 53.7689824119564 1983 53.929849117535 1984 53.9756103650758 1985 53.9075534570488 1986 53.8262313459347 1987 53.7359606067477 1988 53.6452848580093 1989 53.5591889864558 1990 53.4774862207377 1991 53.4013700229688 1992 53.3322609239519 1993 53.2707586628735 1994 53.2105687721705 1995 53.1468100044305 1996 53.0779454057268 1997 53.0033171873222 1998 52.9251578309571 1999 52.8494475482197 2000 52.6280411035173 2001 52.265786642547 2002 51.9123360922172 2003 51.5685212157886 2004 51.2368830024388 2005 50.9220988196957 2006 50.7738932585615 2007 50.7871265669342 2008 50.8087509252019 2009 50.8244956794537 2010 50.832040971117 2011 50.8759509331734 2012 50.9095261053482 2013 50.8833174247033 2014 50.8472121912229 2015 50.7955689666171 2016 50.7414763881929 2017 50.7121925553062 2018 50.7012959506424 2019 50.6769280606379 2020 50.6460531215932 2021 50.6216448113418 2022 50.6002562114844 2023 50.5742562701172