Year % of total population 1960 50.3788685676029 1961 51.0486313503629 1962 50.9094298420814 1963 50.7836367700753 1964 50.6727289598218 1965 50.5369142017587 1966 50.3802816901408 1967 50.234211862972 1968 50.0953861372147 1969 49.9725050407425 1970 49.9227689688869 1971 49.7727712961721 1972 49.4950207351821 1973 49.2486448773681 1974 49.028080523144 1975 48.81280110117 1976 48.5987817546511 1977 48.3963357806924 1978 48.1935774079235 1979 47.9970712140667 1980 47.9263245033113 1981 47.9587574247843 1982 47.9919113060625 1983 48.0371582308067 1984 48.0900980827049 1985 48.1533087369495 1986 48.2299148318223 1987 48.3220617623028 1988 48.4175963288235 1989 48.5076182440816 1990 48.5861846352485 1991 48.5728151493542 1992 48.4857438321761 1993 48.4100877192982 1994 48.3335119494159 1995 48.2436638506003 1996 48.1492100811423 1997 48.0540719383656 1998 47.9544859078489 1999 47.8562883136877 2000 47.7598558025604 2001 47.7251263818677 2002 47.7549315386401 2003 47.7891283274924 2004 47.8251501269404 2005 47.8526685511969 2006 47.8707024428714 2007 47.87760428892 2008 47.8700625457824 2009 47.8345402800868 2010 47.8010589587534 2011 47.779673871824 2012 47.7413073978983 2013 47.6935939572162 2014 47.6296876662507 2015 47.5414141610653 2016 47.4334414949763 2017 47.3142139006981 2018 47.185912297144 2019 47.057306647095 2020 46.9146373031202 2021 46.7644443556364 2022 46.6133815915146 2023 46.4658227848101