Year % of total population 1960 59.6985125976691 1961 59.4781549291008 1962 59.5471573015084 1963 59.7968738838778 1964 60.0600352325411 1965 60.1806741013021 1966 60.1137043686415 1967 59.8933876377575 1968 59.6157351065018 1969 59.4003513070007 1970 59.2718006795017 1971 59.2823600906027 1972 59.4779938587513 1973 59.8412197686646 1974 60.3331980540329 1975 60.8826116458496 1976 61.3887261970971 1977 61.8262664454647 1978 62.2629729307874 1979 62.6378265044369 1980 62.8252906080554 1981 62.9192593214126 1982 63.1219957224682 1983 63.4813318607669 1984 63.9980309307954 1985 64.632586193759 1986 65.2475453372195 1987 65.7513108499221 1988 66.11223408652 1989 66.3738683991485 1990 66.3229992008014 1991 65.9480813844017 1992 65.5790547100361 1993 65.2871012292069 1994 65.0773627339906 1995 64.9289778405532 1996 64.8191750322638 1997 64.7612259444048 1998 64.7366754819915 1999 64.7113229584267 2000 64.6074131876707 2001 64.4426352821726 2002 64.3291041906959 2003 64.3048627474982 2004 64.4048315894734 2005 64.6315616628302 2006 64.9518749051161 2007 65.3530666682852 2008 65.7916703344068 2009 66.2027585368818 2010 66.2369242897426 2011 65.918598965282 2012 65.5274893023703 2013 65.1052952937374 2014 64.6924530047421 2015 64.2503780256938 2016 63.7931290522821 2017 63.3467966739025 2018 62.9471537485623 2019 62.5726468355631 2020 62.3417104431221 2021 62.2447723034703 2022 62.105842252488 2023 61.9275868449049