Year % of total population 1960 43.6006818312099 1961 43.8760722139021 1962 44.2013814931486 1963 44.5962728188757 1964 44.9967336212607 1965 45.3457000640413 1966 45.6735829545664 1967 45.9162162083886 1968 45.997500315308 1969 45.9444164810844 1970 45.7940800651266 1971 45.5467537880835 1972 45.2365653395888 1973 44.9094103758477 1974 44.5803364833365 1975 44.257267284143 1976 43.9115868092693 1977 43.5288043909099 1978 43.1172051306217 1979 42.6811249852132 1980 42.2204718161138 1981 41.7654673378756 1982 41.3430237195034 1983 40.9483180764293 1984 40.5981242469509 1985 40.2864691873776 1986 39.9895277173818 1987 39.658604682764 1988 39.2410273239905 1989 38.7191396827381 1990 38.1180632968617 1991 37.4612265801122 1992 36.7647690325747 1993 36.058484112983 1994 35.3377173480253 1995 34.60332692712 1996 33.8262084395926 1997 32.9804489928408 1998 32.0831561116974 1999 31.1306920968154 2000 30.1440553472696 2001 29.1544321588423 2002 28.1980365466116 2003 27.3243937146881 2004 26.5605506370367 2005 25.9041563359783 2006 25.324489071363 2007 24.8082621115876 2008 24.3707515851144 2009 24.0278957647057 2010 23.8018597874037 2011 23.649526366465 2012 23.6322936129896 2013 23.7790075108286 2014 23.9964474420568 2015 24.2444168660958 2016 24.4834024243801 2017 24.6980703373838 2018 24.8551385663077 2019 24.9378854654251 2020 24.9500708082235 2021 24.9187430165639 2022 24.8400852792184 2023 24.6759469629015