Year % of total population 1960 49.9183773515775 1961 49.9745776886252 1962 50.016743291587 1963 50.0599957395653 1964 50.1034134714225 1965 50.1457830516212 1966 50.1849965870819 1967 50.223592603142 1968 50.2652471635948 1969 50.3094875312862 1970 50.3508123604427 1971 50.4003549628646 1972 50.459435852752 1973 50.5149199531202 1974 50.5688109991161 1975 50.612945235809 1976 50.6467243739763 1977 50.6779684492423 1978 50.7033988391933 1979 50.7240285303138 1980 50.7434432277722 1981 50.7638274844286 1982 50.7853053591493 1983 50.8030649821322 1984 50.8166897664292 1985 50.8229540010286 1986 50.8208089116786 1987 50.815276802909 1988 50.8063635645332 1989 50.7953673480059 1990 50.7822635675104 1991 50.7693902116076 1992 50.759450475352 1993 50.7519622514197 1994 50.7387377011877 1995 50.7223894161611 1996 50.7107305296999 1997 50.7039275858248 1998 50.6995311895625 1999 50.6930190848337 2000 50.6869049996097 2001 50.6833488022689 2002 50.6832065690964 2003 50.6776187071041 2004 50.6656478262214 2005 50.6554932582001 2006 50.644229449811 2007 50.6336513106807 2008 50.6228210227853 2009 50.6066535972639 2010 50.5877634478126 2011 50.5695924494602 2012 50.5567874421383 2013 50.54740970904 2014 50.5348816345132 2015 50.5229492569595 2016 50.5136009485704 2017 50.5033751741248 2018 50.494976808453 2019 50.4903060686299 2020 50.4907514942702 2021 50.4937365245497 2022 50.4933870161048 2023 50.4889097896958