Year % of total population 1960 50.8095029800719 1961 50.7587577493851 1962 50.7109267617587 1963 50.6670138069669 1964 50.6311721811003 1965 50.6067017971462 1966 50.5898314566106 1967 50.5803458992506 1968 50.5769653749671 1969 50.5778805131354 1970 50.5801501814644 1971 50.5854207483929 1972 50.5941102415095 1973 50.6029881342171 1974 50.6126148110105 1975 50.6246550180562 1976 50.6397098154962 1977 50.6579074007672 1978 50.6792664250798 1979 50.7037830938956 1980 50.7342043510204 1981 50.7672292160351 1982 50.8016902096152 1983 50.8440916154902 1984 50.8930710812362 1985 50.9448612975823 1986 50.9990778331328 1987 51.0539598714379 1988 51.1090827501481 1989 51.1648113506496 1990 51.2229552344961 1991 51.2795041310943 1992 51.339833466766 1993 51.4115311614015 1994 51.4895070062863 1995 51.5668919157226 1996 51.6356963430752 1997 51.6935397980951 1998 51.7485825921711 1999 51.7922458385203 2000 51.817314343064 2001 51.8313075772322 2002 51.8324198319458 2003 51.825653763025 2004 51.8168500795137 2005 51.8035766359006 2006 51.7825310106726 2007 51.7524923776094 2008 51.7159608193604 2009 51.6768951378142 2010 51.6398712217013 2011 51.6085232522839 2012 51.5808969246071 2013 51.5608786614538 2014 51.5478881915037 2015 51.5346780307098 2016 51.5259989166399 2017 51.5212404496084 2018 51.5093016005354 2019 51.4938039274405 2020 51.4945677676803 2021 51.5042402787855 2022 51.5067857297153 2023 51.5049904175072