Year % of total population 1960 50.6069620811881 1961 50.5657214514394 1962 50.5261749876475 1963 50.4894208056711 1964 50.4567781874073 1965 50.424054839513 1966 50.392589638086 1967 50.3644818024022 1968 50.337911018216 1969 50.3131101771695 1970 50.2902941000103 1971 50.2694674896021 1972 50.2475123511972 1973 50.2229887981222 1974 50.196589485625 1975 50.170644534343 1976 50.1484653730628 1977 50.1307506947032 1978 50.1169245368756 1979 50.1074039228443 1980 50.1040409050779 1981 50.1075553733613 1982 50.114827173248 1983 50.1271117902162 1984 50.142943443163 1985 50.1594657613032 1986 50.1776092591499 1987 50.1946761802616 1988 50.2091216057049 1989 50.226085299475 1990 50.2445045995395 1991 50.2627858555854 1992 50.2821523747413 1993 50.297196342296 1994 50.3097418531298 1995 50.3270103075326 1996 50.3525003094186 1997 50.3800690799505 1998 50.4052314044334 1999 50.4310939834806 2000 50.456357674871 2001 50.4770359080041 2002 50.4907192206588 2003 50.4986685885337 2004 50.5032428259265 2005 50.5058096584885 2006 50.5075809585775 2007 50.5094130266562 2008 50.5118885374917 2009 50.5145372052205 2010 50.5163150587272 2011 50.5172467323959 2012 50.5189168889486 2013 50.5186622491264 2014 50.5163568848211 2015 50.5140395188911 2016 50.5125960248568 2017 50.5116031474746 2018 50.5083098486839 2019 50.5050170599877 2020 50.5009366736964 2021 50.494191207544 2022 50.4869699768828 2023 50.4804861812839