Year % of total population 1960 50.0816226484225 1961 50.0254223113748 1962 49.983256708413 1963 49.9400089412024 1964 49.8965819220842 1965 49.8542169483788 1966 49.8150034129181 1967 49.7764030026083 1968 49.7347528364052 1969 49.6905124687138 1970 49.6491834454196 1971 49.5996450371354 1972 49.540564147248 1973 49.4850760501712 1974 49.4311929301949 1975 49.387054764191 1976 49.3532756260237 1977 49.3220352941441 1978 49.2965974770392 1979 49.2759714696862 1980 49.2565532039601 1981 49.2361725155714 1982 49.2146911833662 1983 49.1969350178678 1984 49.1833102335708 1985 49.1770459989714 1986 49.1791943405309 1987 49.1847264005299 1988 49.1936395909575 1989 49.2046326519941 1990 49.2177333685442 1991 49.2306067677703 1992 49.2405525036504 1993 49.2480377485803 1994 49.2612622988123 1995 49.2776077222901 1996 49.2892694703001 1997 49.2960724141752 1998 49.3004688104375 1999 49.3069809151663 2000 49.3130950003903 2001 49.316651197731 2002 49.3167934309036 2003 49.3223786804404 2004 49.3343547598431 2005 49.3445041823242 2006 49.355770550189 2007 49.3663511970864 2008 49.3771789772147 2009 49.3933488606844 2010 49.4122341191047 2011 49.4304075505398 2012 49.4432101742059 2013 49.45259029096 2014 49.4651183654868 2015 49.4770530548016 2016 49.4863990514296 2017 49.4966270957849 2018 49.505023191547 2019 49.5096939313701 2020 49.5092485057298 2021 49.5062634754503 2022 49.5066129838952 2023 49.5110902103042