Year % of total population 1960 48.184119604063 1961 48.186326871336 1962 48.1839777529477 1963 48.1846493809886 1964 48.1909030285731 1965 48.2011798692963 1966 48.2133090768175 1967 48.2271131408118 1968 48.2464124557447 1969 48.2682493433766 1970 48.2896629529781 1971 48.3124019500346 1972 48.3371482567328 1973 48.3655005294983 1974 48.3991758013275 1975 48.4313188972091 1976 48.4549189386392 1977 48.4729080893674 1978 48.4897939509125 1979 48.5076312707948 1980 48.5259125479926 1981 48.543296199277 1982 48.5598392888807 1983 48.5760415691163 1984 48.5932555952431 1985 48.6119355106925 1986 48.6293934159555 1987 48.6612994972392 1988 48.6823142691976 1989 48.6789549090208 1990 48.6757239378951 1991 48.671994258504 1992 48.668340019495 1993 48.6639135525146 1994 48.6581307031456 1995 48.6770054948097 1996 48.7203371156162 1997 48.7614193072403 1998 48.7908173115268 1999 48.7503594874993 2000 48.6633865232359 2001 48.5942033346384 2002 48.5323430832607 2003 48.4747846308291 2004 48.4215647268442 2005 48.3726973337615 2006 48.3300398443183 2007 48.3019515521624 2008 48.3134756569801 2009 48.3533595376214 2010 48.392280096331 2011 48.4271984578994 2012 48.4573093649541 2013 48.4832953972833 2014 48.5034803446008 2015 48.5223044036635 2016 48.5422355440977 2017 48.5604826575357 2018 48.5775960136506 2019 48.5937257600264 2020 48.6077739033799 2021 48.6220484911267 2022 48.6386023799581 2023 48.6557383565283