Year % of total population 1960 55.4272436492705 1961 55.2041564202241 1962 54.9588397205234 1963 54.6990767672322 1964 54.367696283305 1965 54.1296175627289 1966 54.0325551451982 1967 53.9086760140967 1968 53.7705889524976 1969 53.6148819298878 1970 53.4365819434727 1971 53.2386283249034 1972 52.9837167900477 1973 52.6926609121178 1974 52.4020327656669 1975 52.0789107051475 1976 51.7077196859083 1977 51.3067201503533 1978 50.9154966229691 1979 50.6542557226509 1980 49.6861495074156 1981 48.7900083109853 1982 49.7619584550797 1983 50.5960633017117 1984 49.8836361293687 1985 49.1334982489998 1986 49.2365322694093 1987 49.5019291238465 1988 49.6485798566415 1989 49.7112749066725 1990 49.4734145073621 1991 49.5709382411393 1992 49.8136778209297 1993 49.2158180773929 1994 48.6396060912193 1995 48.9501812782848 1996 49.1107337960878 1997 48.7818744485546 1998 48.5755628240077 1999 48.516879901487 2000 48.4186241250145 2001 48.2517750729493 2002 48.1921126053977 2003 48.4194245857549 2004 48.8286891885299 2005 49.0321051089194 2006 49.0459995905694 2007 49.0358985971018 2008 49.1072303837651 2009 49.1796542279279 2010 49.1653108137749 2011 49.22968561457 2012 49.3277253474075 2013 49.4572140621536 2014 49.6095950935107 2015 49.6148730922753 2016 49.6307611022996 2017 49.746915725986 2018 49.8915132518724 2019 50.0238329009493 2020 50.1506320194447 2021 50.3202551377378 2022 50.4824788839582 2023 50.6415450773153