Year % of total population 1960 50.6938191207648 1961 50.6927616828331 1962 50.6883183612299 1963 50.6814372340138 1964 50.6733978242768 1965 50.6638665433235 1966 50.6521261032119 1967 50.6389857978177 1968 50.6245692858176 1969 50.6077380374122 1970 50.5904523699328 1971 50.5744282292208 1972 50.5582862517076 1973 50.5409030623917 1974 50.5215817429045 1975 50.4999177196755 1976 50.4784853780893 1977 50.4576857371591 1978 50.4369198782208 1979 50.416914140024 1980 50.3974828318846 1981 50.3810326177045 1982 50.3682843792451 1983 50.3566294114919 1984 50.3460134816555 1985 50.3388572723338 1986 50.3335203830934 1987 50.3293297718119 1988 50.3260232877687 1989 50.3225453329036 1990 50.3167612973036 1991 50.3078154936513 1992 50.2955151685772 1993 50.2801594353853 1994 50.2645498767047 1995 50.2511703289539 1996 50.2379167422984 1997 50.2247988590217 1998 50.211037927609 1999 50.1943840321812 2000 50.1775846215132 2001 50.1600450574938 2002 50.1403568430256 2003 50.1201715328959 2004 50.097444520592 2005 50.0727729915118 2006 50.0463889796808 2007 50.0196360931731 2008 49.9920289042218 2009 49.9651800137029 2010 49.9387007169209 2011 49.9109306245733 2012 49.8840201627486 2013 49.8588351149393 2014 49.8358689437698 2015 49.8147052632804 2016 49.7952450702578 2017 49.7777924929913 2018 49.7632377282603 2019 49.7517073079599 2020 49.7421049015822 2021 49.7355239762406 2022 49.7301806740177 2023 49.7239556566255