Year % of total population 1960 42.972245634797524 1961 43.065481672981626 1962 43.17245652902116 1963 43.31219684722252 1964 43.48714604749225 1965 43.654103648423 1966 43.798796258070574 1967 43.93837964267105 1968 44.07094896558143 1969 44.20060422838082 1970 44.33250460990925 1971 44.46618073958109 1972 44.5979721835968 1973 44.70804517220223 1974 44.79230960644739 1975 44.87247139612383 1976 44.956171677137654 1977 45.02577285365625 1978 45.07767523825816 1979 45.134181067005706 1980 45.19175668553492 1981 45.261862362351586 1982 45.33613263936008 1983 45.394662103728685 1984 45.442748439347874 1985 45.479635976468074 1986 45.50732003640514 1987 45.533409713556445 1988 45.54496447672385 1989 45.54087296020324 1990 45.53162362747178 1991 45.511474199830204 1992 45.48230682348404 1993 45.44904414159572 1994 45.34656834200885 1995 45.213752395674504 1996 45.13490570938445 1997 45.04901169877652 1998 44.911003171387144 1999 44.75474572699914 2000 44.61221588648671 2001 44.477489000818366 2002 44.349352139161404 2003 44.22716152051801 2004 44.11402066265545 2005 44.02053297176741 2006 43.944367086467 2007 43.875899201328444 2008 43.815795748724355 2009 43.757691653419776 2010 43.692028909449455 2011 43.62095270782295 2012 43.552337927322185 2013 43.47409111633824 2014 43.36679303997631 2015 43.22662527962937 2016 43.079506362835055 2017 42.9191644241295 2018 42.728834323251924 2019 42.520433957947944 2020 42.29507586515356 2021 42.064038281326255 2022 41.82299504406409 2023 41.552793375787736