Year % of total population 1960 50.1481843147552 1961 50.1563689984282 1962 50.215916513172 1963 50.2983753722251 1964 50.3558989922897 1965 50.4098884870754 1966 50.4582807884381 1967 50.4978758681118 1968 50.5265635002487 1969 50.5444131687626 1970 50.5560474727227 1971 50.5718839412702 1972 50.5869533787286 1973 50.5969066117638 1974 50.6063753587804 1975 50.6159763203539 1976 50.6250097258316 1977 50.6313212246322 1978 50.6386684939022 1979 50.6465519534904 1980 50.6514604176247 1981 50.6549710624225 1982 50.6645900090641 1983 50.6787490737885 1984 50.6902058750469 1985 50.6990243337011 1986 50.7108557393565 1987 50.7270783358386 1988 50.7425445339706 1989 50.7545260284021 1990 50.7589373507343 1991 50.7669321633281 1992 50.7154774747364 1993 50.5894907739173 1994 50.4806154783607 1995 50.5038397874155 1996 50.5674381940663 1997 50.566251246112 1998 50.5694927177665 1999 50.4908147039843 2000 50.3335237220403 2001 50.1780475546707 2002 50.0877835772789 2003 50.0687543393934 2004 50.0540976957176 2005 50.0390154820745 2006 50.0223682471799 2007 50.0071514690749 2008 49.995374424739 2009 49.9833715110679 2010 49.9701981251564 2011 49.9577750025154 2012 49.9478918092974 2013 49.9378036975286 2014 49.92630472462 2015 49.91679166892 2016 49.907070243712 2017 49.8983654667021 2018 49.8910097085817 2019 49.8840683084095 2020 49.87437662003 2021 49.8588904261338 2022 49.8435946902917 2023 49.832836213051