Year % of total population 1960 49.7009448053881 1961 49.69388325229737 1962 49.68847690750325 1963 49.68547682484962 1964 49.682025167554485 1965 49.67900631325384 1966 49.677081065296804 1967 49.67436059738059 1968 49.67104518035521 1969 49.66872217998001 1970 49.665855863598324 1971 49.67203263228822 1972 49.68688466514294 1973 49.703412520343264 1974 49.723332603145394 1975 49.7426912885799 1976 49.75606200107565 1977 49.76590630221558 1978 49.77017151074929 1979 49.77344503368934 1980 49.802496109641666 1981 49.811423423571114 1982 49.777080395914766 1983 49.727458052649396 1984 49.66744045749545 1985 49.600787834500544 1986 49.569983060206795 1987 49.579613306046085 1988 49.58158630733833 1989 49.58449507243382 1990 49.59238179478941 1991 49.59977652332314 1992 49.59044004419999 1993 49.56563937261695 1994 49.54494968176547 1995 49.524609189248295 1996 49.50119830585178 1997 49.49334304935966 1998 49.500128944009816 1999 49.50611781647132 2000 49.51760828744603 2001 49.53225752122711 2002 49.54824887302862 2003 49.567184995779876 2004 49.586326881406826 2005 49.603978870485044 2006 49.622147978303886 2007 49.641153176264936 2008 49.658545523777995 2009 49.67328234464545 2010 49.68771391419057 2011 49.70234828514169 2012 49.71618669819847 2013 49.7302205708129 2014 49.7453552502297 2015 49.76599819718395 2016 49.77900676179455 2017 49.78628166647766 2018 49.79760587586671 2019 49.80729294081885 2020 49.81617149993673 2021 49.82328492851151 2022 49.829811940807815 2023 49.83714570605568