Year % of total population 1960 49.8469945930852 1961 49.8696601757961 1962 49.8953030686469 1963 49.9191915766586 1964 49.9421548944715 1965 49.9646334497573 1966 49.9866077304868 1967 50.0079800018109 1968 50.0288034226247 1969 50.0485365053999 1970 50.0670048601806 1971 50.0848528396653 1972 50.1019473470042 1973 50.1181177360134 1974 50.1330936212681 1975 50.1464799867784 1976 50.1585070908508 1977 50.1697517935028 1978 50.1804638197115 1979 50.1902567025729 1980 50.1989318151341 1981 50.2066309887682 1982 50.2136909358479 1983 50.2201762029578 1984 50.2266093628835 1985 50.2336383757126 1986 50.2414805201436 1987 50.2503610258215 1988 50.2598218087983 1989 50.2693616973463 1990 50.2831803226254 1991 50.3006203124117 1992 50.317800185618 1993 50.3348028089343 1994 50.3513103129676 1995 50.368455365848 1996 50.3860582454567 1997 50.40349972545 1998 50.4210329894906 1999 50.4390667063755 2000 50.4619962550403 2001 50.4897106158708 2002 50.5179408631093 2003 50.545384623379 2004 50.5724495478864 2005 50.5979560714716 2006 50.6212121403099 2007 50.6429977026929 2008 50.6624784088728 2009 50.680096735128 2010 50.6976809966792 2011 50.7148027556554 2012 50.7310637380196 2013 50.7463227803274 2014 50.7591873867865 2015 50.7726625904252 2016 50.7905841323915 2017 50.8083587076298 2018 50.8226083810694 2019 50.8365364644823 2020 50.8531400244162 2021 50.8733506678742 2022 50.8934516497428 2023 50.9103066878747