Year % of total population 1960 48.706523874227614 1961 48.73785247146158 1962 48.76141217888803 1963 48.78017644161163 1964 48.80033517737289 1965 48.82048479895411 1966 48.839280171848564 1967 48.86222929946104 1968 48.889141067244275 1969 48.9137560964936 1970 48.934919962167186 1971 48.96257980247733 1972 48.98827991126328 1973 49.00279735895804 1974 49.01622489994946 1975 49.030960119718614 1976 49.04857784599804 1977 49.0738946978144 1978 49.11349768512353 1979 49.15328359053027 1980 49.14675932720653 1981 49.135237338462574 1982 49.15211009186751 1983 49.17027412095977 1984 49.187788445487165 1985 49.20168512872862 1986 49.214442278703224 1987 49.23005237114849 1988 49.248205382727036 1989 49.25905131996679 1990 49.265187489830936 1991 49.2734457937626 1992 49.28373279511984 1993 49.292286404864285 1994 49.29592573176642 1995 49.2990933785962 1996 49.3045743992636 1997 49.31132774422266 1998 49.31716051908334 1999 49.32172746222268 2000 49.327096683162374 2001 49.330171200479775 2002 49.33039935788487 2003 49.33142235850446 2004 49.33485649595293 2005 49.340104704963515 2006 49.345900958123714 2007 49.35295169787679 2008 49.36143458149759 2009 49.37009495049132 2010 49.38013246260718 2011 49.3912642820749 2012 49.401266788671045 2013 49.41042811701978 2014 49.41975904435496 2015 49.46037100233072 2016 49.530577483195664 2017 49.58955248074769 2018 49.633623041833154 2019 49.66939941537877 2020 49.695348072949336 2021 49.71332143426208 2022 49.724036723324716 2023 49.72823625980781