Year % of total population 1960 51.3755763893915 1961 51.338815934845 1962 51.3046735946582 1963 51.2742111173338 1964 51.2477767025571 1965 51.2250359260037 1966 51.2164279936153 1967 51.2246352902359 1968 51.2367067108071 1969 51.2466973330233 1970 51.2558389665455 1971 51.265514580017 1972 51.2771874278935 1973 51.2893821541447 1974 51.2982666401336 1975 51.3071480892784 1976 51.3235027076218 1977 51.3141747429504 1978 51.27752548912 1979 51.2467846739943 1980 51.2208599560393 1981 51.2006536714833 1982 51.1862152566391 1983 51.1759453613192 1984 51.1700247811744 1985 51.1686937076219 1986 51.1698819364243 1987 51.1708473547073 1988 51.1712021250144 1989 51.1725185667569 1990 51.1787845579092 1991 51.1923222704083 1992 51.2134026970703 1993 51.2414324026383 1994 51.2751374378468 1995 51.3168208203972 1996 51.363985577755 1997 51.4133157107136 1998 51.465116440676 1999 51.5143263941066 2000 51.5585763350121 2001 51.603232283936 2002 51.6271756496815 2003 51.6211713246672 2004 51.6048964723382 2005 51.5863067141583 2006 51.5703630151815 2007 51.5604001691073 2008 51.5585429072294 2009 51.5650250328369 2010 51.574016124052 2011 51.5780366102654 2012 51.5796153153594 2013 51.5821806104548 2014 51.5834346710985 2015 51.5790879760901 2016 51.5707284943494 2017 51.5706168272843 2018 51.5804351993899 2019 51.5939978317178 2020 51.6210954839199 2021 51.6519647609548 2022 51.6284864537421 2023 51.6040417010928