Year % of total population 1960 48.9394942922819 1961 48.9506651852679 1962 48.963964135318 1963 48.9780169435515 1964 48.9900524239112 1965 49.0019816084817 1966 49.0164606980142 1967 49.0300051733057 1968 49.0436898873976 1969 49.0595729250053 1970 49.0773486583879 1971 49.0958564392243 1972 49.1143182669146 1973 49.1312601528755 1974 49.1470469486317 1975 49.1628727349474 1976 49.1783809271211 1977 49.1942365501035 1978 49.210051464961 1979 49.2249941111056 1980 49.2410670183879 1981 49.2572544817038 1982 49.2748722430137 1983 49.2942899624953 1984 49.3138488895715 1985 49.3327355391006 1986 49.3516141490788 1987 49.3709503478392 1988 49.3907340853596 1989 49.410721697339 1990 49.4306367672131 1991 49.4509378759301 1992 49.4723580793603 1993 49.4938003923446 1994 49.5138582183244 1995 49.5433899839924 1996 49.5823487029822 1997 49.6224803060842 1998 49.6653254336139 1999 49.7109039269353 2000 49.7575288604681 2001 49.8083561025264 2002 49.8652451822171 2003 49.9256383134624 2004 49.9937901786029 2005 50.074570422936 2006 50.1663190317157 2007 50.2675874030665 2008 50.3738801408519 2009 50.4839308587263 2010 50.6001092861046 2011 50.7201692524683 2012 50.8391930113981 2013 50.9487305924743 2014 51.0352822144998 2015 51.086729862259 2016 51.1028632838751 2017 51.0883719626299 2018 51.056654799335 2019 51.0224118673881 2020 50.9829785136613 2021 50.9320731135893 2022 50.8794085539006 2023 50.8328524653139