Year % of total population 1960 55.235270327442 1961 55.1016299961753 1962 54.8864332900467 1963 54.4750027699467 1964 53.8939903533684 1965 53.3529805534622 1966 52.8840606546921 1967 52.4290581898475 1968 51.9868869228512 1969 51.5557452759246 1970 51.1355418947268 1971 50.7266586188949 1972 50.3209541766413 1973 49.9180274431356 1974 49.7225299333754 1975 49.7224002454285 1976 49.762219975949 1977 49.8541779237153 1978 49.9470282114489 1979 49.9974048918826 1980 49.9771981656317 1981 49.9137709831688 1982 49.8367522460018 1983 49.7382796562085 1984 49.612446021441 1985 49.7688039172726 1986 50.2998208106922 1987 50.9938856119328 1988 51.8116238859257 1989 52.7106412624764 1990 53.6581817859396 1991 54.6357694517744 1992 55.636721735922 1993 56.6407222853966 1994 57.2228532408044 1995 57.487922705314 1996 57.8943355484584 1997 58.4171495394525 1998 59.0240539819141 1999 59.679581423506 2000 60.3680873250269 2001 61.0860489751452 2002 61.8231125594588 2003 62.582147557164 2004 63.5658027709201 2005 64.7659105149826 2006 65.9533059874067 2007 67.0558262547825 2008 68.0200344885014 2009 68.8028375514404 2010 70.5561528629666 2011 72.8288642819946 2012 74.5041158045282 2013 75.3696406300764 2014 75.3433014883641 2015 75.1996915866101 2016 75.3085671669619 2017 75.1243655124097 2018 74.4332865009047 2019 73.2765696641673 2020 71.6002019193342 2021 70.4394519951571 2022 70.2144834099528 2023 70.1916766572273