Year % of total population 1960 52.1265830189231 1961 52.1900141684925 1962 52.2437307523097 1963 52.2888090324766 1964 52.3291135638497 1965 52.5294452471649 1966 52.8915987509894 1967 53.2531107282759 1968 53.6114853558281 1969 53.9652348496856 1970 54.2715502394283 1971 54.3614962781744 1972 54.1604625591086 1973 53.8168357053523 1974 53.4607537353467 1975 53.1268116439768 1976 52.8139776416187 1977 52.5220330917707 1978 52.252193917075 1979 52.0042529378847 1980 51.783762244587 1981 51.6054488082894 1982 51.5408955346434 1983 51.5602182297446 1984 51.5852870802515 1985 51.6234245247228 1986 51.6733756592041 1987 51.7323972168891 1988 51.7967575590356 1989 51.8627210716072 1990 51.9280284224666 1991 51.9929971664165 1992 51.9900471248227 1993 51.9184660478081 1994 51.8515587172707 1995 51.7936246545489 1996 51.7348020344224 1997 51.6725187945316 1998 51.6086559211548 1999 51.543902130462 2000 51.4795438292747 2001 51.417025648011 2002 51.3563920161771 2003 51.2970594948828 2004 51.2382166495884 2005 51.1806010861118 2006 51.1166565735333 2007 51.0457926045907 2008 50.9776717214993 2009 50.9186689878023 2010 50.8701206312295 2011 50.8364194247804 2012 50.8141627498075 2013 50.7978701813665 2014 50.787479605163 2015 50.7715479675911 2016 50.7490596901228 2017 50.7249858441861 2018 50.6945189480825 2019 50.6659993871269 2020 50.6476982031902 2021 50.6365458814112 2022 50.6212608771028 2023 50.5985754397926