Year % of total population 1960 41.9097369852862 1961 42.2481645558548 1962 42.6210471027884 1963 42.9987479696478 1964 43.3156880326053 1965 43.5559544365647 1966 43.6743687068861 1967 43.5446331826661 1968 43.2724027906766 1969 42.9169373980302 1970 42.3476769257396 1971 41.7165737378121 1972 41.1301956568872 1973 40.43236595756 1974 39.6042728773682 1975 38.682022655644 1976 37.6693519806717 1977 36.6634857977631 1978 35.7075949992371 1979 34.866775972289 1980 34.1379603584454 1981 33.457590066897 1982 32.8288327343752 1983 32.1497403938328 1984 31.324185814699 1985 30.3745019518363 1986 29.3708908679981 1987 28.3896266342285 1988 27.4812725881868 1989 26.6505587161994 1990 25.9236446495848 1991 25.3056760718552 1992 24.7589825264834 1993 24.2704740716324 1994 23.7612635052467 1995 23.1669239268006 1996 22.559683995903 1997 22.0167137511748 1998 21.5661149054322 1999 21.2237346791417 2000 20.989920384651 2001 20.7633764009146 2002 20.467020879756 2003 20.1262939214527 2004 19.7330424333477 2005 19.2670659150277 2006 18.727653052184 2007 18.1391984309777 2008 17.5396279065895 2009 16.959980401753 2010 16.4000053510289 2011 15.8011843735018 2012 15.2008036396689 2013 14.6755856379674 2014 14.2118744015851 2015 13.7713099130236 2016 13.3699301095085 2017 13.0498634789107 2018 12.7596372847442 2019 12.4535136924578 2020 12.1664146109619 2021 11.8923557199027 2022 11.5716420487458 2023 11.2350646363971