Year % of total population 1960 51.2028770638427 1961 51.230499033678 1962 51.2656489985954 1963 51.308583055041 1964 51.357071502345 1965 51.407287033614 1966 51.45746174341 1967 51.5082466448107 1968 51.5591678486481 1969 51.6097670633539 1970 51.659482322901 1971 51.7068706659771 1972 51.7505705305252 1973 51.7908012740653 1974 51.8257155808733 1975 51.8518392738146 1976 51.8684311384307 1977 51.877958551893 1978 51.8785422300529 1979 51.8695718548043 1980 51.8504404499378 1981 51.817460898299 1982 51.7690343120217 1983 51.7057324514858 1984 51.6280798511747 1985 51.536025348982 1986 51.4316235585234 1987 51.3159747917951 1988 51.187719103076 1989 51.0453716460574 1990 50.8913023289974 1991 50.7306755951777 1992 50.5654351024703 1993 50.3986868283833 1994 50.2366879892799 1995 50.0828166427351 1996 49.9417209692324 1997 49.8136132837531 1998 49.7070239080495 1999 49.6288642441697 2000 49.578271167915 2001 49.5605990844784 2002 49.5744106627361 2003 49.6143053762523 2004 49.6722089764914 2005 49.739830127869 2006 49.8113962669479 2007 49.8859575200162 2008 49.9599381913203 2009 50.0267015544229 2010 50.082463816319 2011 50.1230067426173 2012 50.1477598486685 2013 50.1594380907055 2014 50.1623035523709 2015 50.1575552449435 2016 50.1434366412675 2017 50.1214681760325 2018 50.0939342297028 2019 50.0607018448559 2020 50.0119469145393 2021 49.9509582409422 2022 49.8822265324712 2023 49.8116287764714