Year % of total population 1960 50.29903030386903 1961 50.30612118605355 1962 50.311538036747066 1963 50.314556657985875 1964 50.3180210298566 1965 50.32105525661399 1966 50.32299853729167 1967 50.325733296155875 1968 50.329058716321065 1969 50.331391837100426 1970 50.33427101025681 1971 50.32810295723346 1972 50.31326191789751 1973 50.29673830927856 1974 50.276811793806054 1975 50.25744601669228 1976 50.24406922946127 1977 50.23420790061113 1978 50.22992495228696 1979 50.226642882209724 1980 50.19757789023966 1981 50.18863975411249 1982 50.222979767877234 1983 50.27259699380633 1984 50.33261396785111 1985 50.399265811924494 1986 50.43006507175801 1987 50.42042585162138 1988 50.418452220417635 1989 50.41555498633146 1990 50.40767274809816 1991 50.40028455098952 1992 50.40962687871154 1993 50.43443389861495 1994 50.455122783643986 1995 50.47544822274442 1996 50.498842777132424 1997 50.50670873221561 1998 50.499945664561565 1999 50.49396667631729 2000 50.4824835523657 2001 50.46784341990165 2002 50.451857190746296 2003 50.4329271279774 2004 50.41379530655974 2005 50.39615382155815 2006 50.377994952185084 2007 50.35899914349978 2008 50.34161899207317 2009 50.32689227855062 2010 50.312477482375435 2011 50.29784972678866 2012 50.284022963890884 2013 50.27000087867376 2014 50.25487321451316 2015 50.23423486021675 2016 50.22123002851026 2017 50.21395845105048 2018 50.2026363657491 2019 50.1929516499505 2020 50.18407259405369 2021 50.17695619691428 2022 50.17046656276316 2023 50.16311584630952