Year % of total population 1960 53.14171001707981 1961 52.84172570859309 1962 52.596792438624114 1963 52.38815616020112 1964 52.24928922461987 1965 52.15393151880459 1966 52.06151794326615 1967 51.992627646304015 1968 51.96371473017975 1969 51.96299409877285 1970 51.97375007242093 1971 51.99126127578049 1972 52.011505891801214 1973 52.04605859688279 1974 52.10646112077746 1975 52.13955040661917 1976 52.122492957342516 1977 52.1525124948112 1978 52.23123397345143 1979 52.29777189558851 1980 52.359609988360106 1981 52.546886131062635 1982 52.71496217647911 1983 52.74859865015327 1984 52.790109581028716 1985 52.841751634948125 1986 52.90307121608707 1987 52.97978346340122 1988 53.08509607384292 1989 53.244104643587995 1990 53.53311633884379 1991 53.91979900299822 1992 54.234956736297875 1993 54.49716356028441 1994 54.85878011930813 1995 55.4107832452438 1996 56.04488884393509 1997 56.758894323967375 1998 57.52965326459824 1999 58.32017453967582 2000 59.116535202713536 2001 59.901389214636424 2002 60.61265138604301 2003 61.28599777988147 2004 61.95202765652127 2005 62.557088547272066 2006 63.13640713956446 2007 63.678151520577266 2008 64.06306038507675 2009 64.29717350563259 2010 64.43529913939747 2011 64.42789736184257 2012 64.29632891034007 2013 64.086691356751 2014 63.82396698501745 2015 63.57417448350044 2016 63.41057372209925 2017 63.30697272390007 2018 63.24386945033772 2019 63.25132103291522 2020 63.310130543910866 2021 63.418914819303744 2022 63.588566093391 2023 63.7998135033567