Year % of total population 1960 49.5779302512258 1961 49.5991156022436 1962 49.6208358801956 1963 49.6416575544648 1964 49.6623844961834 1965 49.6853934366795 1966 49.7101261182492 1967 49.7353796241866 1968 49.7613045297184 1969 49.7880364584085 1970 49.8166089405165 1971 49.8465973178579 1972 49.8759869094209 1973 49.9346923922637 1974 50.0151052724198 1975 50.0887771009598 1976 50.1628319169245 1977 50.2359391816802 1978 50.3055358932009 1979 50.3686885609361 1980 50.4220646773925 1981 50.4668069632368 1982 50.494360142671 1983 50.5070176677008 1984 50.5187190289864 1985 50.5294303659626 1986 50.5387886283573 1987 50.5471978176275 1988 50.554788646556 1989 50.5615637230189 1990 50.5670951999103 1991 50.5712817382742 1992 50.573748126922 1993 50.574164162982 1994 50.5727870058089 1995 50.5696345090496 1996 50.564419508644 1997 50.5581130563152 1998 50.5503357504059 1999 50.540237415965 2000 50.5288145424341 2001 50.5165554679508 2002 50.501767517032 2003 50.4818751361321 2004 50.4589274939978 2005 50.4368912362116 2006 50.416094892654 2007 50.3968322825258 2008 50.3794408933123 2009 50.3632745493526 2010 50.3482032856078 2011 50.3344918555789 2012 50.3219477178516 2013 50.3102410862301 2014 50.2987905701148 2015 50.286891282707 2016 50.2743347086106 2017 50.2616356096324 2018 50.249281116839 2019 50.2361552618627 2020 50.2211538679453 2021 50.1993720277115 2022 50.173432295925 2023 50.1550675913981