Year % of total population 1960 45.7390168616661 1961 46.126729173018 1962 46.3620560252533 1963 46.6267102236648 1964 46.8499454208372 1965 46.9730534608121 1966 47.0853313094522 1967 47.1890633219498 1968 47.1928344947966 1969 47.1439808536288 1970 47.0936360509615 1971 47.0499964175032 1972 46.9943815157168 1973 46.9077657048402 1974 46.774072157038 1975 46.801671752988 1976 47.0437621465898 1977 47.0926247089044 1978 46.8926953386744 1979 46.6526936974283 1980 46.4084761402306 1981 46.1660840158673 1982 45.9117484758136 1983 45.6359604684454 1984 45.3285058613515 1985 44.9857734445614 1986 44.5964998878512 1987 44.2080707660853 1988 43.8119514696571 1989 43.3596374568608 1990 42.8495014945093 1991 42.3264644147134 1992 41.821739902934 1993 41.2773956881228 1994 40.6566544747136 1995 39.8946949335175 1996 38.7981835478758 1997 37.444076171585 1998 36.1692110306919 1999 34.9946652916402 2000 33.8371868170204 2001 32.7263156479464 2002 31.680728751997 2003 30.7297098830547 2004 29.8947366834505 2005 29.202915565809 2006 28.6324748044199 2007 28.1674231662105 2008 27.8362184291359 2009 27.6366118667936 2010 27.5713933296071 2011 27.6388893506668 2012 27.8323428423819 2013 28.1584699662781 2014 28.570631176968 2015 29.0032210252725 2016 29.4353647954254 2017 29.8505202648759 2018 30.2080649353292 2019 30.472591519729 2020 30.647082668821 2021 30.7120765410478 2022 30.6432466710353 2023 30.449042214516