Year % of total population 1960 86.29936132807558 1961 86.00568270079849 1962 85.71553063620648 1963 85.40949972355894 1964 85.09228032216784 1965 84.76640962530902 1966 84.43838898743773 1967 84.0878395898926 1968 83.72758787502902 1969 83.35563476413894 1970 82.9807399529122 1971 82.55782114959372 1972 82.12845059993461 1973 81.70424089945787 1974 81.27531652344851 1975 81.13482082547279 1976 80.6652578926762 1977 80.195532326715 1978 79.71500026120512 1979 79.25790732375329 1980 78.7632852691395 1981 78.28883688189673 1982 77.93309793779326 1983 77.55956787404469 1984 77.15647171568801 1985 76.72973386045521 1986 76.29432948815807 1987 75.85627271985325 1988 75.41852673198206 1989 74.9898040737777 1990 74.55973792331787 1991 74.1956741782423 1992 73.85158295899028 1993 73.51268987475919 1994 73.16651538947814 1995 72.82669999353311 1996 72.51133208557191 1997 72.1836607846557 1998 71.85203810149746 1999 71.52818761789929 2000 71.19260563451532 2001 70.79256667004435 2002 70.385701866707 2003 69.97995703025883 2004 69.56754571943956 2005 69.14269831926771 2006 68.7062770885658 2007 68.2836358859597 2008 67.81441127531048 2009 67.34863464343567 2010 66.87022949538093 2011 66.41928233673424 2012 65.99077882271003 2013 65.5678908269705 2014 65.13619986256678 2015 64.66597855188319 2016 64.18344866270125 2017 63.69374475324749 2018 63.19692878169773 2019 62.69247507128818 2020 62.18491227018292 2021 61.674362814956574 2022 61.14981566828961 2023 60.6123764890907