Year % of total population 1960 51.6223350513894 1961 51.5835567350262 1962 51.5480303709851 1963 51.516069863229 1964 51.4880897241139 1965 51.461985382372 1966 51.4407123326352 1967 51.4251149886437 1968 51.4122273663853 1969 51.4041897576463 1970 51.4026515393017 1971 51.3949881421224 1972 51.3737849308226 1973 51.3506894452598 1974 51.3253125502272 1975 51.297259538929 1976 51.2770311261219 1977 51.2677891885852 1978 51.2672100799359 1979 51.2676593567583 1980 51.2641622610397 1981 51.2603492657714 1982 51.2530533058934 1983 51.2408768074329 1984 51.2293581613903 1985 51.2191856943514 1986 51.2147994067228 1987 51.2152400949785 1988 51.2305433851344 1989 51.2545410709551 1990 51.2744200562969 1991 51.2985459678634 1992 51.3249276984198 1993 51.3473681771189 1994 51.3675080733236 1995 51.3896419606303 1996 51.4101982927293 1997 51.4301858025796 1998 51.4531035573485 1999 51.4822439113214 2000 51.4498811838045 2001 51.4087963793265 2002 51.4256791310253 2003 51.4422796962658 2004 51.4595667607575 2005 51.4788335134846 2006 51.5034498374057 2007 51.5312494921716 2008 51.5520671584229 2009 51.5623344503873 2010 51.5679352415695 2011 51.5751169310191 2012 51.5831952436856 2013 51.5896311254491 2014 51.594158002494 2015 51.5988552529539 2016 51.6052234145581 2017 51.6096982488587 2018 51.6111682899222 2019 51.6131525341056 2020 51.6237406503311 2021 51.6433186349929 2022 51.5879172981407 2023 51.5442779343192