Year % of total population 1960 50.7339980656091 1961 50.7967859355316 1962 50.8676090535772 1963 50.9356174603682 1964 50.9953098185575 1965 51.0476775527556 1966 51.0941737405153 1967 51.1337868247277 1968 51.1696982201958 1969 51.2120588778739 1970 51.2707487156492 1971 51.3477931905043 1972 51.4359402968302 1973 51.52210040859 1974 51.5966365767318 1975 51.6585470546242 1976 51.6770152421567 1977 51.6461252174382 1978 51.5907664850063 1979 51.5161258211228 1980 51.4294040928201 1981 51.3351955508135 1982 51.2377517554248 1983 51.140523914437 1984 51.0465987036197 1985 50.9565614469983 1986 50.8678647918801 1987 50.8028041079953 1988 50.8093628355495 1989 50.8167841364997 1990 50.7799478445142 1991 50.7436534851009 1992 50.7077019614881 1993 50.6722438295858 1994 50.6362388546534 1995 50.5992876647225 1996 50.5621112925535 1997 50.5279172385713 1998 50.492666935284 1999 50.4531168500175 2000 50.4145795720987 2001 50.3801578478473 2002 50.3805693959878 2003 50.4142395218578 2004 50.4537284449533 2005 50.4997070407478 2006 50.5496606511984 2007 50.6017247208304 2008 50.6528974930362 2009 50.7012461019718 2010 50.7478394219102 2011 50.7551947756226 2012 50.7258829246414 2013 50.6978553996508 2014 50.6709579307827 2015 50.644824215344 2016 50.6206176011173 2017 50.5971261447997 2018 50.5740882909335 2019 50.5520689107749 2020 50.5285958154976 2021 50.5043607400166 2022 50.4804559514515 2023 50.4589541923443