Year % of total population 1960 50.5267321338296 1961 50.3425610034499 1962 50.1930491550194 1963 50.0876085414936 1964 49.9973181805008 1965 49.8824219416397 1966 49.7619183803003 1967 49.6640857423644 1968 49.5894368954795 1969 49.5333761105598 1970 49.5005801979111 1971 49.5706903013545 1972 49.7317392929359 1973 49.9009183767938 1974 50.0824769932217 1975 50.2760824742338 1976 50.4866482662826 1977 50.7291266228367 1978 51.0148146955436 1979 51.353219030259 1980 51.754928726988 1981 52.2029015364085 1982 52.6609157962938 1983 53.1272247103767 1984 53.61057390208 1985 54.1034148330419 1986 54.6202664028735 1987 55.1709601359273 1988 55.7288975587143 1989 56.2787428534515 1990 56.8428263738413 1991 57.4087535013052 1992 57.9193721979805 1993 58.3552874199539 1994 58.7428660506401 1995 59.0975726821421 1996 59.438071450553 1997 59.7821209928917 1998 60.1154911218333 1999 60.4397491415616 2000 60.7566818828987 2001 61.0544783016102 2002 61.3445968576915 2003 61.6335401396364 2004 61.9415531436557 2005 62.2769005313294 2006 62.6209258412569 2007 62.9630411900142 2008 63.2909014295125 2009 63.6103003447694 2010 63.9449728969391 2011 64.2482351870247 2012 64.5220595174973 2013 64.8149984595324 2014 65.1127953550935 2015 65.4058933566959 2016 65.6734856551068 2017 65.9112051373316 2018 66.1370386406361 2019 66.3801669981065 2020 66.6419602489641 2021 66.9132261234742 2022 67.1697669892258 2023 67.3925045513695