Year % of total population 1960 48.3908828771391 1961 48.3424983922192 1962 48.2909131193397 1963 48.2430241903839 1964 48.2095257719975 1965 48.1964477475877 1966 48.1954866482308 1967 48.1605710407726 1968 48.071831444931 1969 47.9634463541401 1970 47.8545380646472 1971 47.7480309421802 1972 47.6469053200773 1973 47.5552772391755 1974 47.4746474089409 1975 47.4073419882834 1976 47.3578237610309 1977 47.3587939401986 1978 47.4071641236907 1979 47.4604164112376 1980 47.5098736308899 1981 47.4995537235683 1982 47.4918786518483 1983 47.5418189029832 1984 47.5928794055246 1985 47.6921981776765 1986 47.8166130247209 1987 47.9194484023995 1988 48.031554540717 1989 48.1250726434466 1990 48.2030090947306 1991 48.2861869908465 1992 48.3586171115423 1993 48.4094096078351 1994 48.4092574787389 1995 48.4035307207733 1996 48.4279268313977 1997 48.3348709138881 1998 48.2212746652765 1999 48.2015377515049 2000 48.1874747694314 2001 48.1726451801236 2002 48.150900877324 2003 48.133117113101 2004 48.1249132078021 2005 48.121162138511 2006 48.1131261395427 2007 48.1011210249371 2008 48.1762045014543 2009 48.3441198444404 2010 48.5095279656702 2011 48.6594998421345 2012 48.8020988911722 2013 48.9371100732439 2014 49.061921278306 2015 49.1781723130759 2016 49.2872797420448 2017 49.3881308679075 2018 49.4820876435246 2019 49.572037930495 2020 49.6263514743935 2021 49.6389663088342 2022 49.61154060599 2023 49.5571603423129