Year % of total population 1960 51.1399098264708 1961 51.103250283498 1962 51.072706718096 1963 51.0490965321884 1964 51.0285252705867 1965 51.0084305198312 1966 50.9907794542664 1967 50.9763783020655 1968 50.9658345539009 1969 50.9590318106197 1970 50.9545518731769 1971 50.9525593317975 1972 50.9515713996995 1973 50.9500112561409 1974 50.946444326149 1975 50.9404323658588 1976 50.9337973769159 1977 50.9269319467841 1978 50.9196549428097 1979 50.9130384089049 1980 50.9074358564117 1981 50.9027628197019 1982 50.8997723204413 1983 50.8971613972778 1984 50.8951894646166 1985 50.8959544714546 1986 50.9000684554814 1987 50.907753637243 1988 50.917731121984 1989 50.9306997067245 1990 50.9487603067272 1991 50.9698557730263 1992 50.9899531132943 1993 51.0076859968067 1994 51.0256463320942 1995 51.0440745554091 1996 51.061996365842 1997 51.0798398258135 1998 51.0948548446149 1999 51.1104154008553 2000 51.1278258840328 2001 51.1391628896476 2002 51.1453457596758 2003 51.1510670388459 2004 51.1566065098308 2005 51.1619165084815 2006 51.1675303734944 2007 51.1728021118917 2008 51.1775354716549 2009 51.1822491153266 2010 51.1855999362844 2011 51.1870853396497 2012 51.1875014844747 2013 51.1863361199102 2014 51.1830397943742 2015 51.1768800456031 2016 51.1676901343851 2017 51.1531675357066 2018 51.1342654938918 2019 51.1147267357803 2020 51.0897989295376 2021 51.0592464213306 2022 51.0309628340573 2023 51.0056406744715