Year % of total population 1960 47.0247258654053 1961 47.1274893238282 1962 47.3084670121663 1963 47.47768945416 1964 47.6367413462594 1965 47.7887536075795 1966 47.9307655538504 1967 48.0625987510345 1968 48.1907421687751 1969 48.3100160436254 1970 48.4165089044189 1971 48.4864864864865 1972 48.5225377683214 1973 48.5576942728793 1974 48.591219885215 1975 48.622769031527 1976 48.6561791600063 1977 48.6900341660558 1978 48.7209621965746 1979 48.7488804520992 1980 48.7335107956226 1981 48.6767916319832 1982 48.619945079447 1983 48.5577279195337 1984 48.488605754842 1985 48.4182528081392 1986 48.3426868444479 1987 48.2621571674902 1988 48.1844320263408 1989 48.1104038893333 1990 48.0924641129842 1991 48.1033299666155 1992 48.0873287934454 1993 48.0660549052664 1994 48.0402121415908 1995 48.015844271701 1996 47.9925264371578 1997 47.9694100841869 1998 47.9517679277202 1999 47.9426127115115 2000 47.9337406529961 2001 47.9152300312386 2002 47.8913887898519 2003 47.8655994975682 2004 47.8367255730806 2005 47.8066773787744 2006 47.7733197744291 2007 47.742812513815 2008 47.7205787958259 2009 47.6980616601714 2010 47.7017665837917 2011 47.7334601395352 2012 47.7611994337375 2013 47.786466328355 2014 47.8098546630005 2015 47.8310432496772 2016 47.8501627495523 2017 47.8689910346828 2018 47.8876462343755 2019 47.9056320936541 2020 47.9270947262668 2021 47.949146514936 2022 47.9642089939106 2023 47.9742548626749