Year % of total population 1960 48.75792776495612 1961 48.83994349804362 1962 48.931232441675824 1963 49.02433092401918 1964 49.09782721895503 1965 49.15322005449797 1966 49.20387960979305 1967 49.25079828044182 1968 49.29534672205696 1969 49.33838369447475 1970 49.39270889688236 1971 49.45342984642142 1972 49.48878717985014 1973 49.50386550609668 1974 49.518341232205856 1975 49.5326269439175 1976 49.54673926867976 1977 49.56108581331341 1978 49.575242287935964 1979 49.58880683203764 1980 49.601672846887055 1981 49.59921262861445 1982 49.57999712492876 1983 49.557629148746535 1984 49.53809091842675 1985 49.52379534028753 1986 49.50769467841188 1987 49.488648054265376 1988 49.47018668731963 1989 49.45328106648465 1990 49.44875313009528 1991 49.456329323309504 1992 49.46681324608735 1993 49.4789788155953 1994 49.49060423581751 1995 49.51211334428051 1996 49.54130942316564 1997 49.56752640114096 1998 49.593846565633385 1999 49.620510975033156 2000 49.64497923027084 2001 49.6660509059719 2002 49.68675050248658 2003 49.694599015106704 2004 49.678448480097806 2005 49.65137404336456 2006 49.62291240940032 2007 49.59360371153958 2008 49.56584772823672 2009 49.5392600561562 2010 49.51930539997399 2011 49.50451120295965 2012 49.48875431988801 2013 49.455412101055934 2014 49.40030687342151 2015 49.34571949979461 2016 49.292824815325964 2017 49.23701813700026 2018 49.27808257790933 2019 49.27057372343928 2020 49.18464289796004 2021 49.16652256227306 2022 49.15087333975839 2023 49.13663945692478