Year % of total population 1960 47.7121770264358 1961 47.7730011678703 1962 47.8759634343072 1963 47.9389993143968 1964 47.9971216399518 1965 48.0499968926504 1966 48.0977181920205 1967 48.1389204902045 1968 48.1740609950577 1969 48.2037513913389 1970 48.2289161667848 1971 48.25025615083 1972 48.2741058170514 1973 48.305232336424 1974 48.338304829981 1975 48.3707858183465 1976 48.4051318485842 1977 48.4381958139831 1978 48.4674396695885 1979 48.4933211001053 1980 48.5111501721098 1981 48.5162307635312 1982 48.5134662960035 1983 48.5106417601031 1984 48.5093740382465 1985 48.5073120570612 1986 48.5047932320992 1987 48.5029137026179 1988 48.5016024101635 1989 48.5002839727913 1990 48.4965625789903 1991 48.4776486931436 1992 48.4549635664471 1993 48.4422345860682 1994 48.4282651173138 1995 48.4128455606804 1996 48.3956481347344 1997 48.3750660360549 1998 48.3462788707441 1999 48.3087270143361 2000 48.2741698762776 2001 48.2485207683505 2002 48.2259902844906 2003 48.2144638903536 2004 48.2097109454631 2005 48.1972671494011 2006 48.1764234375978 2007 48.1493454516488 2008 48.1235936113277 2009 48.098031304232 2010 48.0715330580521 2011 48.0481354083589 2012 48.0275445078939 2013 48.0073548807957 2014 47.9896367425066 2015 47.9762207467096 2016 47.9649387558572 2017 47.9586276001758 2018 47.956810349675 2019 47.9521165628256 2020 47.9382794656976 2021 47.9268289841709 2022 47.9309105688468 2023 47.9446647448335