Year % of total population 1960 48.26809497161752 1961 48.30886336040617 1962 48.34770139232882 1963 48.383549010086895 1964 48.416507647116646 1965 48.44710180134562 1966 48.47214686569497 1967 48.490069953233906 1968 48.50400088816805 1969 48.514413518555465 1970 48.5190642850226 1971 48.521728274519326 1972 48.52733166071268 1973 48.53360388270345 1974 48.54142327106653 1975 48.549590671067016 1976 48.552823643208164 1977 48.55715035266927 1978 48.56296207842779 1979 48.56674374428652 1980 48.569533167577845 1981 48.56910340824509 1982 48.568273776472495 1983 48.567775505122235 1984 48.56484423018952 1985 48.56052515516445 1986 48.55510808390027 1987 48.54851648907575 1988 48.53587579099002 1989 48.51878496207455 1990 48.500669949157384 1991 48.47815770745944 1992 48.45203789228451 1993 48.426200982966606 1994 48.40038349246643 1995 48.371447807748055 1996 48.34259810197277 1997 48.31499392497837 1998 48.285836828098674 1999 48.25514713513032 2000 48.2473194850001 2001 48.24775140478717 2002 48.236083479580714 2003 48.232886254902134 2004 48.23355874496165 2005 48.23678175410656 2006 48.23917193051365 2007 48.23904740469654 2008 48.24199020358335 2009 48.25129415948089 2010 48.26375213132058 2011 48.277532862164385 2012 48.29000148075335 2013 48.29953627978016 2014 48.310982518730405 2015 48.32817850353893 2016 48.34701885000518 2017 48.36556151801485 2018 48.38629789614436 2019 48.40598986076827 2020 48.41304418818089 2021 48.40443212490265 2022 48.444890758332754 2023 48.4841099821128