Year % of total population 1960 46.2523010221928 1961 46.3475387321932 1962 46.4454335732084 1963 46.5763450181871 1964 46.7446454666046 1965 46.9059622494495 1966 47.0540757104782 1967 47.2073833632091 1968 47.3442295417867 1969 47.4666074541236 1970 47.5814084051811 1971 47.6938441866219 1972 47.7887596352737 1973 47.8351214566701 1974 47.783784409846 1975 47.6705779833197 1976 47.5755682627071 1977 47.4748619676888 1978 47.3632472332149 1979 47.2568784597567 1980 47.1508168668695 1981 47.0513238769925 1982 46.9943663425449 1983 46.9922685202027 1984 47.0457851645091 1985 47.1277008010705 1986 47.2369123194637 1987 47.3854134776439 1988 47.5539151772565 1989 47.6997118884193 1990 47.7811173982923 1991 47.8263877051388 1992 47.8428261410397 1993 47.7748819430868 1994 47.5639975825893 1995 47.2479607869303 1996 46.8624700143633 1997 46.4097667280108 1998 45.932982247955 1999 45.4480353209908 2000 44.9692519875357 2001 44.5585669797481 2002 44.2353548479201 2003 43.9381943516432 2004 43.5875342045005 2005 43.1693591636792 2006 42.7693979242421 2007 42.4508569943352 2008 42.2313666689734 2009 42.0932446748536 2010 42.1141366818956 2011 42.259147830041 2012 42.3339648880744 2013 42.3346990147053 2014 42.2010386143302 2015 41.9807806298249 2016 41.7744073983582 2017 41.5313309584298 2018 41.3281283278275 2019 41.2331332188798 2020 41.1776527376411 2021 41.0858547692635 2022 40.9294363697355 2023 40.7061694436173