Year % of total population 1960 50.6910782276191 1961 50.6747184017626 1962 50.6590363618898 1963 50.6440809610269 1964 50.6276355696055 1965 50.6069620948179 1966 50.5874766335936 1967 50.5706123224127 1968 50.5523724715074 1969 50.5301312094123 1970 50.5064673812589 1971 50.484758219163 1972 50.4644480546875 1973 50.4472280830825 1974 50.4305387868732 1975 50.4151810024386 1976 50.403498152748 1977 50.3931021778103 1978 50.385004002257 1979 50.3796943545579 1980 50.3743316394007 1981 50.3742744829999 1982 50.3783156524671 1983 50.382836129359 1984 50.3883984867591 1985 50.3917605972008 1986 50.3947365186848 1987 50.3983286574722 1988 50.4012212719072 1989 50.4011528414573 1990 50.3998254731334 1991 50.4005971450392 1992 50.4003234255656 1993 50.3969904022233 1994 50.3912125353094 1995 50.3820752921472 1996 50.3723776979263 1997 50.3612457650529 1998 50.3495689169029 1999 50.3383118497577 2000 50.3269130198007 2001 50.3180926186624 2002 50.3097906357191 2003 50.3007202866822 2004 50.2911493604214 2005 50.2809271883161 2006 50.2682169636095 2007 50.2546272887571 2008 50.2411748229256 2009 50.2268948464507 2010 50.2140731401057 2011 50.2031015020323 2012 50.1921951073272 2013 50.1807458361465 2014 50.1674755918723 2015 50.1521681665585 2016 50.1352117859624 2017 50.1189064451779 2018 50.1012749333728 2019 50.0808333982361 2020 50.0599148368031 2021 50.0341970257028 2022 50.0056844184589 2023 49.9836632437181