Year % of total population 1960 50.9589516622091 1961 50.9482993489082 1962 50.9199929309604 1963 50.8963075045535 1964 50.8745633079682 1965 50.8515408801584 1966 50.8086197697837 1967 50.7593540821323 1968 50.6836766239008 1969 50.618331495401 1970 50.6128810705611 1971 50.7048426927458 1972 50.8640991652288 1973 51.0030651960822 1974 51.1382091437141 1975 51.2498213547098 1976 51.2019395473153 1977 51.0515479082898 1978 50.9299680418657 1979 50.8101862678893 1980 50.7300641798537 1981 50.6900479052931 1982 50.6543407157577 1983 50.6209179200843 1984 50.58932253269 1985 50.5596944245176 1986 50.5325623455852 1987 50.5078248353293 1988 50.4844719047347 1989 50.4623786099504 1990 50.4414924767703 1991 50.4215348149168 1992 50.4017749837364 1993 50.3820737388895 1994 50.3632011835999 1995 50.3449916694053 1996 50.3288829797485 1997 50.3159107890726 1998 50.3059547827066 1999 50.2999187394156 2000 50.2951380930461 2001 50.2894331631148 2002 50.2829266293818 2003 50.2749945425514 2004 50.2666272774648 2005 50.2582872223544 2006 50.2502416153438 2007 50.2428540466571 2008 50.2357070790334 2009 50.2286244916435 2010 50.2220202664527 2011 50.2148385063017 2012 50.2070720020111 2013 50.2004169263375 2014 50.1944788995678 2015 50.1876813222601 2016 50.1786905490801 2017 50.1693839623926 2018 50.1607150326973 2019 50.151060680568 2020 50.1369922311443 2021 50.1204677243414 2022 50.1075781168919 2023 50.0969682891688