Year % of total population 1960 50.34378913739246 1961 50.35483998032254 1962 50.37684487946175 1963 50.39904598663606 1964 50.425421822081155 1965 50.45535026022063 1966 50.46760013681122 1967 50.4635325279438 1968 50.465031862160565 1969 50.471331425776064 1970 50.47890445554787 1971 50.489063858787155 1972 50.49910050155256 1973 50.50614806475101 1974 50.5214098533769 1975 50.555792511484384 1976 50.602449496781134 1977 50.661545407471046 1978 50.72917171743981 1979 50.793143882095684 1980 50.853126122044785 1981 50.90236353539353 1982 50.93598824816408 1983 50.960229918462296 1984 50.98315018572366 1985 51.01278410090519 1986 51.044963795606684 1987 51.07338457906511 1988 51.09375352752786 1989 51.11782354576122 1990 51.13459856266066 1991 51.16617269004781 1992 51.205929745747774 1993 51.229692168924885 1994 51.24739280358746 1995 51.260524845805904 1996 51.27707508441449 1997 51.30449280428104 1998 51.321378919030934 1999 51.329946347320956 2000 51.33752956349071 2001 51.34106861251795 2002 51.3441585853874 2003 51.34468390386197 2004 51.33690521588884 2005 51.35124690586017 2006 51.4210060762269 2007 51.52546699401177 2008 51.63278109374857 2009 51.71892065139268 2010 51.756764531651775 2011 51.771344278454976 2012 51.78606785224906 2013 51.79474521122544 2014 51.80498112669522 2015 51.84501824762383 2016 51.88898125159489 2017 51.89551352431879 2018 51.881908079574515 2019 51.85153215837038 2020 51.78141446336333 2021 51.71097148629275 2022 51.67322766004981 2023 51.64002254008251