Year % of total population 1960 49.326624437123 1961 49.3389249048284 1962 49.3539053968024 1963 49.3687478283481 1964 49.3847829194495 1965 49.4033669209 1966 49.4225945602649 1967 49.4428637647607 1968 49.4637465315821 1969 49.4857223359811 1970 49.5097033316447 1971 49.5343588579746 1972 49.5589723735055 1973 49.584272358314 1974 49.6113798712145 1975 49.6379522038404 1976 49.6636287970589 1977 49.6904034868548 1978 49.7185813246929 1979 49.7479849849743 1980 49.777339538724 1981 49.8062763197618 1982 49.8342379502457 1983 49.8605696808493 1984 49.8862910405529 1985 49.9112382020255 1986 49.9350887605809 1987 49.9574566076914 1988 49.9778661954195 1989 49.99626572443 1990 50.0133029057548 1991 50.0295311551271 1992 50.0459603384661 1993 50.0966864687589 1994 50.1763645736095 1995 50.2489392615238 1996 50.3142989926486 1997 50.3731005346896 1998 50.4251997845281 1999 50.4691522223112 2000 50.5064557454645 2001 50.5176831139513 2002 50.5046242476476 2003 50.4896450164716 2004 50.4751212501271 2005 50.4616530743955 2006 50.4479409992787 2007 50.4343151049433 2008 50.4201114244864 2009 50.4048374954247 2010 50.3887014624479 2011 50.3721247073223 2012 50.3549061056339 2013 50.3369945442524 2014 50.3194700149409 2015 50.3026712599588 2016 50.2859847030302 2017 50.2690517354985 2018 50.252164552049 2019 50.235516329486 2020 50.2026949701252 2021 50.1557270052863 2022 50.1170555566008 2023 50.0952289008958