Year % of total population 1960 49.780277323886 1961 49.8098676364234 1962 49.8377241162297 1963 49.8631662155048 1964 49.8870430052077 1965 49.9329751090285 1966 49.9758470463421 1967 49.9938426582583 1968 50.0107660893947 1969 50.0268553262911 1970 50.0442036868355 1971 50.0624260708142 1972 50.079082695758 1973 50.0940286111656 1974 50.1077214355413 1975 50.1202889755374 1976 50.1317016463947 1977 50.1420670059723 1978 50.1510797218714 1979 50.157789096928 1980 50.1618367559679 1981 50.1641053455048 1982 50.1652125468767 1983 50.1653513551588 1984 50.1646582100519 1985 50.1637789160706 1986 50.1630755264653 1987 50.1631324782749 1988 50.1644448287855 1989 50.1668115322664 1990 50.1699956964535 1991 50.1732248369903 1992 50.1756752754014 1993 50.1768990112821 1994 50.105360817428 1995 49.9685187070039 1996 49.8394596117925 1997 49.7159781086704 1998 49.5984002175287 1999 49.4864216000858 2000 49.3789275489823 2001 49.2743948580235 2002 49.2340110704812 2003 49.2537320125939 2004 49.2713637660955 2005 49.2894310035999 2006 49.3096635045811 2007 49.3333585756364 2008 49.3609646928661 2009 49.3922561227588 2010 49.426320524604 2011 49.4617637766431 2012 49.4972725229945 2013 49.5320049096928 2014 49.5653180303858 2015 49.596783803544 2016 49.6262583124422 2017 49.6543330837539 2018 49.6820546984631 2019 49.7108128906379 2020 49.7486195941985 2021 49.790548965616 2022 49.8232183058221 2023 49.8505599413817