Year % of total population 1960 49.8019627819891 1961 49.855264800677 1962 49.9533192137662 1963 50.0476796285445 1964 50.1393148010891 1965 50.2394282156943 1966 50.3566203656062 1967 50.4798149173207 1968 50.5933146567269 1969 50.6972927791777 1970 50.7372913064143 1971 50.7163068801056 1972 50.6923282703096 1973 50.6689798872548 1974 50.6450598918956 1975 50.6232821671757 1976 50.613564160585 1977 50.6040068670131 1978 50.5835018133834 1979 50.5640513885518 1980 50.5487422108574 1981 50.5294938719431 1982 50.5169642394179 1983 50.5076100960237 1984 50.4971103535185 1985 50.4909629641977 1986 50.4839810255103 1987 50.4817116843505 1988 50.4786551537682 1989 50.4748409899619 1990 50.4707394604735 1991 50.4659056717316 1992 50.4654990812928 1993 50.4644606460408 1994 50.4681522030624 1995 50.4721590552843 1996 50.4775268494648 1997 50.4794901420225 1998 50.4796714280962 1999 50.4817028279743 2000 50.4833722788494 2001 50.4924295907489 2002 50.5087060277987 2003 50.5270592546404 2004 50.5449715392324 2005 50.5658930299655 2006 50.5808983680231 2007 50.5900592189397 2008 50.603854242129 2009 50.6238621287176 2010 50.6446873564131 2011 50.6604132336164 2012 50.6709769522301 2013 50.6818423173269 2014 50.6960620020804 2015 50.71830332898 2016 50.7444889847754 2017 50.7614937572999 2018 50.5881203608139 2019 50.5316275810797 2020 50.6520119593162 2021 50.6582384183139 2022 50.6814304487657 2023 50.7205833203578