Year % of total population 1960 48.8600901735292 1961 48.896749716502 1962 48.927293281904 1963 48.9509034678116 1964 48.9714747294133 1965 48.9915694801688 1966 49.0092205457336 1967 49.0236216979345 1968 49.0341654460991 1969 49.0409681893803 1970 49.0454480052477 1971 49.0474406682025 1972 49.0484286003005 1973 49.0499887438591 1974 49.0535555626618 1975 49.0595676341412 1976 49.0662026230841 1977 49.0730679471243 1978 49.0803449524935 1979 49.086961694369 1980 49.0925642453827 1981 49.0972370800233 1982 49.1002275808891 1983 49.1028385055619 1984 49.1048105353834 1985 49.1040455285454 1986 49.0999316373027 1987 49.0922462715869 1988 49.0822689676306 1989 49.0693002932755 1990 49.0512396932728 1991 49.0301442269737 1992 49.0100469711785 1993 48.9923139195712 1994 48.9743536679058 1995 48.9559254445909 1996 48.938003634158 1997 48.9201601741865 1998 48.9051451553851 1999 48.8895846787985 2000 48.8721741159672 2001 48.8608371103524 2002 48.8546542403242 2003 48.848932883567 2004 48.8433934901692 2005 48.8380834148835 2006 48.832469702662 2007 48.8271978881083 2008 48.8224646035236 2009 48.817750959349 2010 48.814400137889 2011 48.8129146603503 2012 48.8124985155253 2013 48.8136638074206 2014 48.8169602778181 2015 48.8231199543969 2016 48.8323098656149 2017 48.8468324642934 2018 48.8657345766764 2019 48.8852732642197 2020 48.9102011406413 2021 48.9407535786694 2022 48.9690371659427 2023 48.9943592553861