Year % of total population 1960 50.8050747841595 1961 50.7401524222121 1962 50.6759694813178 1963 50.5854165682721 1964 50.4596988402524 1965 50.3386232507657 1966 50.2295045921139 1967 50.1126205125721 1968 50.0082409839476 1969 49.9152847240302 1970 49.8276258666859 1971 49.738493387692 1972 49.660980189529 1973 49.624306041794 1974 49.6883494180452 1975 49.8190874509869 1976 49.9276322723417 1977 50.0404337073329 1978 50.1650435842792 1979 50.284202416266 1980 50.4023699520907 1981 50.513719684566 1982 50.5799872428319 1983 50.5926699188473 1984 50.5269480273677 1985 50.4034173352416 1986 50.2399691463751 1987 50.0439224743057 1988 49.8636599322518 1989 49.6943921554186 1990 49.5593238709839 1991 49.4617597859876 1992 49.4054756829292 1993 49.4689339573874 1994 49.6876600927843 1995 50.0158025112447 1996 50.4331756868943 1997 50.9267565734258 1998 51.4588942502609 1999 51.9976837939933 2000 52.5172296061113 2001 52.9672235428371 2002 53.3269910053268 2003 53.6571281036556 2004 54.0393432548604 2005 54.4844510910459 2006 54.8991273307128 2007 55.2191785859347 2008 55.4290579010462 2009 55.543742889397 2010 55.4841276655766 2011 55.2849988238541 2012 55.1398995761977 2013 55.0569107380744 2014 55.1028653717109 2015 55.2266044815279 2016 55.3274373279603 2017 55.4613566704363 2018 55.5519184370297 2019 55.5325403745777 2020 55.4843628397763 2021 55.4901026949713 2022 55.5710471371418 2023 55.722412971908