Year % of total population 1960 50.110389588864244 1961 50.11278972818623 1962 50.11461610125465 1963 50.11721451057618 1964 50.120230904249574 1965 50.12397138698265 1966 50.128322331008306 1967 50.1335854456766 1968 50.13977646522057 1969 50.145265956206636 1970 50.148263334714834 1971 50.09846243972867 1972 50.04757877396183 1973 50.04609158466875 1974 50.048238667392845 1975 50.03536561725972 1976 50.01304187693955 1977 50.00268845769584 1978 49.99448370977061 1979 49.98547778942782 1980 49.97983044141551 1981 49.97649136569403 1982 49.975299928423894 1983 49.977056490439075 1984 49.97613229548502 1985 49.976444242900335 1986 49.980814781422964 1987 49.98535146075233 1988 49.98320504888001 1989 49.98170613029872 1990 49.98843001380965 1991 49.99717283122673 1992 50.005128656301586 1993 50.01026795336887 1994 50.0108264370454 1995 50.00476596811424 1996 49.993135179894544 1997 49.981157056724385 1998 49.96778511354798 1999 49.95312700926421 2000 49.943902233158845 2001 49.934460426947304 2002 49.92222111007093 2003 49.90902408081113 2004 49.89460917724745 2005 49.87746651613529 2006 49.85418983291799 2007 49.82998189965886 2008 49.804093575252914 2009 49.77845313175395 2010 49.762104784491896 2011 49.75151255967676 2012 49.74226245369525 2013 49.73336203985105 2014 49.725976688701216 2015 49.72264126708879 2016 49.724822015424174 2017 49.7288741386821 2018 49.729067748494096 2019 49.725963624623965 2020 49.72761340683611 2021 49.7325616258188 2022 49.73121811044605 2023 49.72653524388464