Year % of total population 1960 48.5518819342138 1961 48.4648514175852 1962 48.3906473349192 1963 48.2912708772545 1964 48.2028074373354 1965 48.1457392446085 1966 48.0856341532904 1967 48.0026271446112 1968 47.924052683533 1969 47.8818686123531 1970 47.848740946156 1971 47.8251072923598 1972 47.810817319435 1973 47.4577724499403 1974 47.142952158317 1975 47.2020577579191 1976 47.270570745315 1977 47.3529404067154 1978 47.4492094230284 1979 47.5530324374604 1980 47.6631624278827 1981 47.7755289149523 1982 47.8866971910378 1983 47.9925815098809 1984 48.0892993296159 1985 48.1850111346352 1986 48.2795118366735 1987 48.3633071366203 1988 48.4380539267421 1989 48.506807035729 1990 48.5666539113785 1991 48.6226398563501 1992 48.6770013054121 1993 48.7383145876549 1994 48.8246787932474 1995 48.9463695194832 1996 49.1107627814991 1997 49.321678897631 1998 49.5542742970154 1999 49.8048931740859 2000 50.0863308963015 2001 50.3821734335827 2002 50.7049886296543 2003 51.0849272647221 2004 51.5229941114844 2005 52.019270344665 2006 52.5691573760333 2007 53.1623747252633 2008 53.7505922112067 2009 54.2823789723439 2010 54.7406768767105 2011 55.1265496167875 2012 55.4592545554533 2013 55.7678276909165 2014 56.0419539024825 2015 56.2652612092436 2016 56.4776305180319 2017 56.6341054934363 2018 56.7370433310759 2019 56.8722351708821 2020 57.0909201027254 2021 57.378152691242 2022 57.6979896656655 2023 58.0473746236896