Year % of total population 1960 55.8007737559969 1961 55.5837951500981 1962 55.3511846758282 1963 55.0923636150722 1964 54.9041269949911 1965 54.808031596853 1966 54.7106895031006 1967 54.5969247405886 1968 54.4652279512924 1969 54.3170754269438 1970 54.1408799111329 1971 53.9186637511377 1972 53.6679399530139 1973 53.4246806158097 1974 53.207111134928 1975 53.0197331175646 1976 52.9092153315172 1977 52.8590462580087 1978 52.8071938754593 1979 52.7514523631375 1980 52.6955827606416 1981 52.6434344799898 1982 52.5993202804871 1983 52.5669838553403 1984 52.531485557182 1985 52.4709521794213 1986 52.3832839099863 1987 52.2634629074696 1988 52.1208045432197 1989 51.9816204123991 1990 51.8343341445903 1991 51.6979419800021 1992 51.6205436491124 1993 51.6031777067189 1994 51.6350705994396 1995 51.6562285941692 1996 51.6866305740627 1997 51.7695750854098 1998 51.8758525691594 1999 52.0015402039744 2000 52.1449415695486 2001 52.245002792753 2002 52.3609338714634 2003 52.44795455694 2004 52.4525179957513 2005 52.4799442696072 2006 52.4067248787797 2007 52.2677279229284 2008 52.1788431451863 2009 52.0956219027547 2010 51.9660446942072 2011 51.6321247027169 2012 51.0611776262801 2013 50.4350142849602 2014 49.6198216425601 2015 49.0735543694532 2016 49.0615908579981 2017 49.0522422514995 2018 49.0446103659039 2019 49.1301511357183 2020 49.3126920730224 2021 49.3173594407122 2022 49.3539286092928 2023 49.6398273483928