Year % of total population 1960 49.8691314433519 1961 49.9196946887729 1962 49.9666711105186 1963 50.0106513803221 1964 50.0524529466214 1965 50.0942127766483 1966 50.1328811272331 1967 50.1531287752819 1968 50.1641511320993 1969 50.1766934178524 1970 50.1863000358983 1971 50.1951290019513 1972 50.2035622416438 1973 50.2184068434144 1974 50.2401377894074 1975 50.2696081932323 1976 50.3019286035802 1977 50.3360701923851 1978 50.3737765394333 1979 50.4072324226793 1980 50.4166565142175 1981 50.3790097814702 1982 50.3064373453046 1983 50.2312312396634 1984 50.1649054870045 1985 50.1080793291628 1986 50.0611291275112 1987 50.0233063819173 1988 49.993383488127 1989 49.9666336180598 1990 49.9367923937474 1991 49.8965580394187 1992 49.8679882558114 1993 49.8551750633474 1994 49.8403304905402 1995 49.8240863237969 1996 49.8069951121613 1997 49.7872416257947 1998 49.7653883351197 1999 49.731499896475 2000 49.6933441141073 2001 49.6725642228718 2002 49.6686325121144 2003 49.6639362952309 2004 49.6933687112194 2005 49.7603271900831 2006 49.8190712766556 2007 49.8728316953018 2008 49.9221567350311 2009 49.9663031348201 2010 50.0047254368743 2011 50.0372348601865 2012 50.0643485603014 2013 50.0860031484444 2014 50.102153336356 2015 50.112980268852 2016 50.1183278122621 2017 50.138118645492 2018 50.1726751967312 2019 50.2064511887694 2020 50.2257599551457 2021 50.2300928038947 2022 50.235427965018 2023 50.2458116949799