Year % of total population 1960 62.0919160986496 1961 61.9967620245138 1962 62.1104301732325 1963 62.2707900988994 1964 62.3860212779067 1965 62.46651009299 1966 62.5011429790919 1967 62.5001198369453 1968 62.5083125150556 1969 62.5214344330807 1970 62.5254622412841 1971 62.5013987202863 1972 62.4732299835466 1973 62.4657035757176 1974 62.5075675444801 1975 62.6160042234485 1976 62.8012968825221 1977 62.9779416863443 1978 63.1370200406358 1979 63.3310699777048 1980 63.6441471405037 1981 64.1376455291673 1982 64.6528974065847 1983 65.1274896812978 1984 65.5539710071182 1985 65.7480888564742 1986 65.7774710784475 1987 65.8491821259122 1988 65.9128509720951 1989 65.9212870739947 1990 65.8458951328098 1991 65.6967356757607 1992 65.5621536124196 1993 65.4744405280485 1994 65.4125796066506 1995 65.3686025690472 1996 65.3427445463005 1997 65.3224408321852 1998 65.2713182512201 1999 65.196483224765 2000 65.1296027663845 2001 65.0840490827953 2002 65.0640143448886 2003 65.0713163650343 2004 65.0686181530786 2005 65.0763828528766 2006 65.1213501829884 2007 65.1260218685905 2008 65.0333130490462 2009 64.8765335310917 2010 64.7147140919401 2011 64.4205257361822 2012 63.9724741868208 2013 63.5193513304928 2014 63.0869853477102 2015 62.7080024376832 2016 62.3983313715085 2017 62.1154391215783 2018 61.8543554087466 2019 61.621986517232 2020 61.4383009269549 2021 61.3033694085631 2022 61.142578102636 2023 60.9588424244244