Year % of total population 1960 49.2616232183133 1961 49.3206784330859 1962 49.3726969841357 1963 49.4192430087173 1964 49.4612232242876 1965 49.4982660247954 1966 49.5306876190924 1967 49.5861018132389 1968 49.6383058454084 1969 49.6594002394737 1970 49.6769479924274 1971 49.691677492721 1972 49.7029183674694 1973 50.0478083050095 1974 50.3654424317999 1975 50.3310896680082 1976 50.2940627082672 1977 50.2540523119695 1978 50.2131905222458 1979 50.1725155844505 1980 50.1320152446994 1981 50.0919169815705 1982 50.0532634968149 1983 50.0163954865657 1984 49.9810355939503 1985 49.9467097225151 1986 49.9132524365363 1987 49.8815470550499 1988 49.8521843305203 1989 49.823501748817 1990 49.7935384816689 1991 49.7630372420371 1992 49.7340475039167 1993 49.7075885116176 1994 49.6808955598919 1995 49.6540411048726 1996 49.6289138153205 1997 49.6043323769595 1998 49.600598864489 1999 49.6172424507782 2000 49.6349309575873 2001 49.6783669001182 2002 49.7517741425708 2003 49.8324562155198 2004 49.9100466023626 2005 49.9713514626286 2006 50.0166773806203 2007 50.0523954793568 2008 50.0785808090594 2009 50.1013233324734 2010 50.1236637328362 2011 50.1444806719795 2012 50.1647044652441 2013 50.1816061211726 2014 50.2030715847026 2015 50.2197959512235 2016 50.2252795477778 2017 50.2140100707368 2018 50.1886257693453 2019 50.1644576380791 2020 50.1410427260145 2021 50.1221804218341 2022 50.1063413987465 2023 50.0901841850005