Year % of total population 1960 49.67639831728189 1961 49.68009920228959 1962 49.677494909610196 1963 49.669575315120916 1964 49.66224134471428 1965 49.65769868116851 1966 49.652738497355756 1967 49.64789960408005 1968 49.642727849437115 1969 49.63663097318395 1970 49.63290314872381 1971 49.63139616098447 1972 49.62432501128559 1973 49.61200609901322 1974 49.6005175423732 1975 49.59316947034168 1976 49.591657199027836 1977 49.59073648693754 1978 49.58979510328349 1979 49.591543463481045 1980 49.59001389957821 1981 49.58608700603911 1982 49.586662462103696 1983 49.591231012353774 1984 49.597205555133144 1985 49.60354402975035 1986 49.60489244839605 1987 49.60026425246022 1988 49.59587741409349 1989 49.59009247326797 1990 49.582271434496235 1991 49.57483327709523 1992 49.569853523099724 1993 49.56786674487938 1994 49.5654395698291 1995 49.56295900840102 1996 49.5606545643449 1997 49.55593251475147 1998 49.5506283268961 1999 49.54615962291852 2000 49.540207438390425 2001 49.53567685520761 2002 49.53363364724053 2003 49.532191261798616 2004 49.53151249649237 2005 49.53220969353155 2006 49.53428704382815 2007 49.536813615543046 2008 49.54074102290567 2009 49.54554666220496 2010 49.54916789197866 2011 49.552074730110284 2012 49.55500124060064 2013 49.55834134372477 2014 49.56136435180904 2015 49.56669489773755 2016 49.57641428047949 2017 49.587240959756095 2018 49.5978696639611 2019 49.6095580998268 2020 49.62360836009322 2021 49.640484541512635 2022 49.65443315686958 2023 49.66838009267089