Year % of total population 1960 50.5205923757275 1961 50.5087027926493 1962 50.4571020322087 1963 50.410671063328 1964 50.3861481300682 1965 50.3680902635886 1966 50.3474478496119 1967 50.3266630592822 1968 50.312348729079 1969 50.3015197888485 1970 50.2819206363397 1971 50.2538434768368 1972 50.2308292409469 1973 50.2120130674051 1974 50.1872185050113 1975 50.1484281465046 1976 50.1008186879224 1977 50.0518516926747 1978 50.0051059452289 1979 49.9643435806428 1980 49.9308392676293 1981 49.9150907177015 1982 49.9197247971035 1983 49.9268806836812 1984 49.9279115677575 1985 49.9346876492254 1986 49.9376323162589 1987 49.9217706795683 1988 49.8995183500714 1989 49.8844110482439 1990 49.8680285309664 1991 49.8421234194538 1992 49.8155476442554 1993 49.7926978578297 1994 49.7734801553497 1995 49.7548769513346 1996 49.7279929628217 1997 49.6955337379992 1998 49.6670486575209 1999 49.643947744607 2000 49.624957204933 2001 49.6174514081696 2002 49.622383502353 2003 49.6290801375237 2004 49.6378981318798 2005 49.6505282565983 2006 49.6703576434881 2007 49.70421242977 2008 49.7472429357988 2009 49.7774237552175 2010 49.7806502044037 2011 49.7718301989432 2012 49.7632809924507 2013 49.7425598770359 2014 49.7050884466228 2015 49.662635584299 2016 49.6271672393373 2017 49.607931311547 2018 49.6017931697654 2019 49.6069514066436 2020 49.6228464836318 2021 49.6420038525388 2022 49.6548226518793 2023 49.6609587213428