Year % of total population 1960 47.4649060724911 1961 47.5711529534981 1962 47.6736933619442 1963 47.7697860356999 1964 47.8585585844369 1965 47.9377759900087 1966 48.0104558632406 1967 48.0772697867286 1968 48.1356687970255 1969 48.1897871156254 1970 48.2417893737822 1971 48.2895299166554 1972 48.3339739099423 1973 48.3777544852432 1974 48.4194396277731 1975 48.460323793437 1976 48.4344629398112 1977 48.3322664168202 1978 48.2264220353714 1979 48.1644563749522 1980 48.1391840277234 1981 48.1146303976625 1982 48.0947608550074 1983 48.0803663873797 1984 48.0753405708088 1985 48.0802450683051 1986 48.0897549723382 1987 48.0989276829132 1988 48.1344486569691 1989 48.1873549607736 1990 48.2345059853233 1991 48.2807785927455 1992 48.3117454703691 1993 48.3325359714019 1994 48.3083734345196 1995 48.2367197214466 1996 48.1639621889318 1997 48.0936457859509 1998 48.0241872500963 1999 48.0123123653559 2000 48.0702930782946 2001 48.1403999964743 2002 48.2115954523862 2003 48.2828117389057 2004 48.3769712689004 2005 48.4955876323627 2006 48.6160947755956 2007 48.7380005273466 2008 48.8615504345925 2009 48.9492444209347 2010 49.0020787680079 2011 49.0558300265391 2012 49.1071496343501 2013 49.1564596642688 2014 49.2044451378995 2015 49.2472230896195 2016 49.2795688318895 2017 49.3049294116794 2018 49.3315848022787 2019 49.3620436259919 2020 49.370006721471 2021 49.3477353613772 2022 49.3416729789727 2023 49.3562206204741