Year % of total population 1960 51.4224244675582 1961 51.3252033131964 1962 51.2307995993596 1963 51.1875 1964 51.1735534910026 1965 51.1459428334215 1966 51.1303601946858 1967 51.1278385091601 1968 51.1573451370717 1969 51.2439314992976 1970 51.3833265340129 1971 51.5554788380264 1972 51.7553702245191 1973 51.9783251643379 1974 52.2150409199265 1975 52.4573691665972 1976 52.6938831693413 1977 52.9204093077991 1978 52.9090341846058 1979 52.2240091552623 1980 51.7140402770901 1981 51.7801748740559 1982 51.8151881856199 1983 51.8194298698942 1984 51.7940603512662 1985 51.7525672518574 1986 51.698507189303 1987 51.6433736317128 1988 51.6019578129627 1989 51.5718740870085 1990 51.5530296754097 1991 51.5414329815261 1992 51.5296936828995 1993 51.5330856116347 1994 51.5785650173061 1995 51.6732459418035 1996 51.8279822224257 1997 52.0511989087107 1998 52.3297539980774 1999 52.667634128644 2000 53.0904755458834 2001 53.5667792532742 2002 54.0575038775414 2003 54.5618153175865 2004 55.0633998912539 2005 55.5558108278865 2006 56.0356177595353 2007 56.4826391702012 2008 56.8756478344963 2009 57.2040377406509 2010 57.3388795410934 2011 57.272358273576 2012 57.1472153618057 2013 56.9885801994813 2014 56.8086927206245 2015 56.6386375269726 2016 56.5310114470125 2017 56.4810380410627 2018 56.4563165577972 2019 56.4651639512557 2020 56.5293485409949 2021 56.6611778972321 2022 56.8694422638149 2023 57.1623528426994