Year % of total population 1960 50.2156244470052 1961 50.2040627879234 1962 50.1929154397522 1963 50.1820983376153 1964 50.1715044964961 1965 50.1608676478374 1966 50.1505069826593 1967 50.1404062236057 1968 50.1303921957185 1969 50.1206529492667 1970 50.1110057922959 1971 50.101469494072 1972 50.0922357601156 1973 50.0831357698611 1974 50.0751486430707 1975 50.0681481327317 1976 50.0609744982381 1977 50.0525114591398 1978 50.0449065167927 1979 50.0373187240897 1980 50.0275447776595 1981 50.0166808819233 1982 50.005200103162 1983 49.9938217468974 1984 49.9818182389127 1985 49.9694524070613 1986 49.9566408663779 1987 49.9435177739493 1988 49.9815863811003 1989 50.0534583927118 1990 50.1036133809281 1991 50.1589554981046 1992 50.2022590979258 1993 50.1968438822976 1994 50.168351861569 1995 50.1415074061182 1996 50.1168425349116 1997 50.0918698273525 1998 50.0671725542773 1999 50.044111267975 2000 50.0222611682785 2001 50.0015930330766 2002 49.9822496895422 2003 49.9648862335487 2004 49.9499572714368 2005 49.9359719782347 2006 49.9234073186831 2007 49.9133934131864 2008 49.9049093611373 2009 49.8952049341362 2010 49.8895910240666 2011 49.8860384238572 2012 49.881184785672 2013 49.8775684235383 2014 49.8747749213234 2015 49.8732118629697 2016 49.873072873445 2017 49.8735184305992 2018 49.8728578256677 2019 49.8703234405211 2020 49.8671828097645 2021 49.8661780105816 2022 49.8653985782421 2023 49.8631456611883