Year % of total population 1960 54.20624694936116 1961 54.061455406189886 1962 53.91450132891108 1963 53.74636062352762 1964 53.563384603458076 1965 53.4055518046966 1966 53.274385610352404 1967 53.15089254698565 1968 53.03630948476533 1969 52.92352513861584 1970 52.80938364710206 1971 52.68378821277691 1972 52.55443325343361 1973 52.45497560230409 1974 52.392962441496415 1975 52.36136368810839 1976 52.33864775921547 1977 52.3143657314656 1978 52.29192249886521 1979 52.25998586236554 1980 52.202326195855015 1981 52.14167921043457 1982 52.11344224249844 1983 52.116778355192054 1984 52.12720691796134 1985 52.137683542266686 1986 52.16573402663267 1987 52.21362933087447 1988 52.286025259210454 1989 52.36183408047429 1990 52.43378646603384 1991 52.53277336228926 1992 52.65642739450463 1993 52.7753382467463 1994 52.947565858100184 1995 53.14571725730066 1996 53.29389325514742 1997 53.44370954912259 1998 53.642588544354474 1999 53.85619607232645 2000 54.0552211099637 2001 54.24898004555663 2002 54.426873324394435 2003 54.60093136626879 2004 54.78548906249207 2005 54.97566837830108 2006 55.16114997400887 2007 55.32933367924224 2008 55.47820105710299 2009 55.63471931514848 2010 55.80965755379736 2011 55.993447686041996 2012 56.15997963321636 2013 56.2993126742275 2014 56.44837278269206 2015 56.618574046360145 2016 56.819528560539084 2017 57.04115660564766 2018 57.266279183022576 2019 57.495148163335934 2020 57.735599293353665 2021 57.979239275870356 2022 58.209814134871934 2023 58.43442722221983