Year % of total population 1960 50.17968297988748 1961 50.19440758157547 1962 50.20315731183366 1963 50.20367855439228 1964 50.20454939878761 1965 50.20417320699341 1966 50.20093595863757 1967 50.20316457958195 1968 50.20998178227562 1969 50.21298227188921 1970 50.20689472513593 1971 50.190392505587205 1972 50.171685032237214 1973 50.15408372596405 1974 50.13721437821308 1975 50.12283838878113 1976 50.11148434358593 1977 50.10805224602429 1978 50.11224800329459 1979 50.11718877400131 1980 50.121166964735096 1981 50.12183678138701 1982 50.121337200775805 1983 50.12419197578271 1984 50.11976149771127 1985 50.109138332948994 1986 50.10100029806119 1987 50.09236529898055 1988 50.07874175583102 1989 50.0635883614162 1990 50.05271863912834 1991 50.046197231382365 1992 50.040799692976094 1993 50.03329925864105 1994 50.025628519159234 1995 50.02058199549022 1996 50.017777024681955 1997 50.01720074288811 1998 50.01326938030352 1999 50.00490287561563 2000 49.99612480010061 2001 49.98801793607396 2002 49.97610301978871 2003 49.95957494398324 2004 49.94376898706809 2005 49.93030303584869 2006 49.916596433681406 2007 49.900685515871025 2008 49.88480510484853 2009 49.86870821564467 2010 49.85304728944221 2011 49.83993416624626 2012 49.82916774990622 2013 49.81864998886 2014 49.80791355490774 2015 49.79659063416894 2016 49.78351457944532 2017 49.77029248573332 2018 49.758368649769494 2019 49.747268506077596 2020 49.738955502224485 2021 49.73245269647815 2022 49.72596850775479 2023 49.71985125600601