Year % of total population 1960 53.38171622519 1961 53.3345471675756 1962 53.2559404528204 1963 53.1916126139424 1964 53.1657834277334 1965 53.2064569112915 1966 53.300926480932 1967 53.451413180758 1968 53.6886709148863 1969 54.0721223900057 1970 54.7142984991766 1971 55.4510413646226 1972 56.0682249605392 1973 56.654702802116 1974 57.2962071652101 1975 58.0013889719046 1976 58.7351174866254 1977 59.453587780261 1978 60.0785267502547 1979 60.5313988597598 1980 60.7951220550214 1981 60.8745382077187 1982 60.8016316089669 1983 60.6451103393958 1984 60.4684797682543 1985 60.3143228518764 1986 60.2382335301896 1987 60.2993076409608 1988 60.4803182946298 1989 60.7340489511909 1990 61.0547339024262 1991 61.4557867584374 1992 61.9471614979985 1993 62.5498271217196 1994 63.2760191287263 1995 64.1089918964507 1996 65.034405992231 1997 66.0235788742208 1998 67.0168176035718 1999 67.968577214713 2000 68.8893392708691 2001 69.7671465081688 2002 70.5453751160414 2003 71.199543717696 2004 71.7174347850842 2005 72.095841317736 2006 72.3568080777417 2007 72.5180983933039 2008 72.581360243107 2009 72.5519575846548 2010 72.4392609778373 2011 72.2525739074098 2012 72.0067758383894 2013 71.7232832394978 2014 71.4258879228159 2015 71.1185257398677 2016 70.8089982539655 2017 70.5187720604596 2018 70.4543536324964 2019 70.2303028708087 2020 69.8010139993031 2021 69.6000034083543 2022 69.4385760831903 2023 69.254080134885