Year % of total population 1960 49.511064521403 1961 49.4913263161949 1962 49.4721262118891 1963 49.4535582029509 1964 49.433606077063 1965 49.4143832845274 1966 49.3979108871053 1967 49.3827679474061 1968 49.3686917886127 1969 49.3440381321792 1970 49.2735663249231 1971 49.1717915716176 1972 49.076583352879 1973 48.9889409404832 1974 48.9087161137581 1975 48.8346867091887 1976 48.7652155493504 1977 48.6991362224772 1978 48.6368825647727 1979 48.5802729900736 1980 48.5331367982661 1981 48.505336430927 1982 48.505619442249 1983 48.5088228234625 1984 48.4920019383262 1985 48.4696136918116 1986 48.455884348307 1987 48.4361013842486 1988 48.4017506760392 1989 48.3602324036963 1990 48.3147834727853 1991 48.268757202937 1992 48.2208260566781 1993 48.1727358647173 1994 48.1324880083302 1995 48.1002771145313 1996 48.0776327257895 1997 48.0769079166063 1998 48.0868568770319 1999 48.1074992636083 2000 48.1519109635132 2001 48.2299682377214 2002 48.313646344497 2003 48.3936341232812 2004 48.4769003328554 2005 48.5713976897276 2006 48.6769442964317 2007 48.7847797702852 2008 48.8884433367364 2009 48.9814040109514 2010 49.0563791438075 2011 49.1041450561461 2012 49.1397291140968 2013 49.1739074613573 2014 49.208812188596 2015 49.2382124083669 2016 49.2640072815923 2017 49.2883997240383 2018 49.30908701908 2019 49.3262334813183 2020 49.3383010046379 2021 49.3449510543377 2022 49.3446017082403 2023 49.3388029219819