Year % of total population 1960 49.24301174112112 1961 49.255968724713426 1962 49.26366579559414 1963 49.266603675737734 1964 49.26891548237519 1965 49.273409305623794 1966 49.27840152283094 1967 49.28207230405823 1968 49.28505616226037 1969 49.286730429006326 1970 49.286449577383884 1971 49.288464615783425 1972 49.28757228016066 1973 49.28079471109898 1974 49.27509961524847 1975 49.27393066122654 1976 49.27891236409579 1977 49.284969637864236 1978 49.290978328880406 1979 49.29906625678294 1980 49.30336369531561 1981 49.30535086291209 1982 49.312315026698435 1983 49.32330370718523 1984 49.33522652641816 1985 49.34790356364197 1986 49.355767651755514 1987 49.357291878924194 1988 49.358597462425976 1989 49.357721855717806 1990 49.35437033247864 1991 49.350120811551115 1992 49.347814919259406 1993 49.3475205125576 1994 49.345340055621264 1995 49.342438551285674 1996 49.34019159210411 1997 49.3358644467851 1998 49.33104593107312 1999 49.32680573730396 2000 49.321759667434364 2001 49.318414170554355 2002 49.31719779023427 2003 49.31632957036439 2004 49.31602964175129 2005 49.317028105057986 2006 49.31972208976932 2007 49.32364484903065 2008 49.3296073464334 2009 49.33673310471584 2010 49.34298822104904 2011 49.34874621545193 2012 49.354556333954505 2013 49.360660867808214 2014 49.36608124139427 2015 49.37385063266873 2016 49.38647566009195 2017 49.400342873928814 2018 49.413854255993684 2019 49.42822787872581 2020 49.444848933769336 2021 49.46439337558521 2022 49.481181310858986 2023 49.49778503286798