Year % of total population 1960 48.5336922906598 1961 48.6404103154755 1962 48.7456902715645 1963 48.8514741676673 1964 48.9543112095798 1965 49.0548800413442 1966 49.15155410338 1967 49.2449711491686 1968 49.3349244247416 1969 49.4180392802983 1970 49.4927286849527 1971 49.4639870774912 1972 49.3287066564995 1973 49.1798117773996 1974 49.0407311619532 1975 48.9190263435856 1976 48.8351906889272 1977 48.6975915077141 1978 48.487314287841 1979 48.305262700851 1980 48.1489348075481 1981 48.2955446612677 1982 48.7722442774204 1983 49.3939245777271 1984 50.1440832572865 1985 51.0868704745456 1986 51.5888371967135 1987 51.5076593468656 1988 51.4291560166319 1989 51.3556318596206 1990 51.2943968250824 1991 51.2627777803987 1992 51.4165967545366 1993 51.7480054292207 1994 52.0541863958435 1995 52.346364818473 1996 52.6345975535182 1997 52.7311685746695 1998 52.6663909399613 1999 52.5996350541051 2000 52.5318805998283 2001 52.4710100933493 2002 52.4107018505539 2003 52.3420918755112 2004 52.2684156220136 2005 52.1936823454862 2006 52.1208239206546 2007 52.0520403053887 2008 51.9871489456157 2009 51.9258559655697 2010 51.8633870272777 2011 51.7976634776685 2012 51.733231589112 2013 51.6718517650644 2014 51.5788353535003 2015 51.4010092685827 2016 51.4054219083761 2017 51.5100940024073 2018 51.4779802836206 2019 51.4384952034494 2020 51.394817384131 2021 51.3495337060363 2022 51.3005275914227 2023 51.2501478329