Year % of total population 1960 50.5453775283279 1961 50.7635082223962 1962 50.9533321227529 1963 51.1529690007602 1964 51.3475177304965 1965 51.5077785150778 1966 51.7049360648976 1967 51.9657033979041 1968 52.251302769483 1969 52.4798092037509 1970 52.6837865055388 1971 52.8374448925992 1972 52.9826559215137 1973 53.1176977001599 1974 53.2169365073261 1975 53.2995658465991 1976 53.3590496347375 1977 53.39429383825 1978 53.4199054460613 1979 53.453224767149 1980 53.5003229339249 1981 53.5458404304215 1982 53.479454894036 1983 53.3315195884448 1984 53.1921955382755 1985 53.0507429980141 1986 52.9810327814933 1987 52.9820510129107 1988 52.9826398678858 1989 52.9832103642596 1990 52.9970692004704 1991 52.9458455099758 1992 52.8429027809298 1993 52.7621881127865 1994 52.69426741157 1995 52.6331680650903 1996 52.5262288181832 1997 52.3592344083362 1998 52.1998588654005 1999 52.0341177366537 2000 51.870735434286 2001 51.8298437039222 2002 51.9033437310336 2003 51.996427943226 2004 52.0998791155941 2005 52.2123117781174 2006 52.1422071527405 2007 51.8562583154232 2008 51.5298139504306 2009 51.1658452039214 2010 50.7655308379591 2011 50.5505406209701 2012 50.5330009998169 2013 50.5037342188967 2014 50.4712305050195 2015 50.4390488668358 2016 50.4935208161015 2017 50.6250253937728 2018 50.752536227054 2019 50.8782730571238 2020 50.984555984556 2021 51.0678948300731 2022 51.0949087993586 2023 51.0725701728099