Year % of total population 1960 53.00786718482672 1961 52.76665350716364 1962 52.560897423463324 1963 52.37047877950468 1964 52.201857755856444 1965 52.04799330926063 1966 51.90803330564349 1967 51.8005216247936 1968 51.74296515452276 1969 51.71800267820574 1970 51.698726576901514 1971 51.6836106134083 1972 51.669134338695116 1973 51.66491645109117 1974 51.696761050480404 1975 51.69461476143191 1976 51.66136067895219 1977 51.711406929324035 1978 51.82223018586159 1979 51.94357536050938 1980 52.076654840624016 1981 52.211346750080416 1982 52.345956591708735 1983 52.48040992210711 1984 52.60995245830708 1985 52.74202581270706 1986 52.87363979224712 1987 53.008307689243274 1988 53.169389692210565 1989 53.36321359908544 1990 53.54883070128936 1991 53.832587840831394 1992 54.16111579933981 1993 54.51139748475146 1994 54.90249700189319 1995 55.3321804214093 1996 55.794656698641646 1997 56.29090563724425 1998 56.80563179736592 1999 57.32676638309521 2000 57.84672063044044 2001 58.35402306379223 2002 58.842100973144376 2003 59.31032010995891 2004 59.757228743382385 2005 60.224476232333934 2006 60.764557326754556 2007 61.332541897408355 2008 61.79715310755087 2009 62.14483740172254 2010 62.36565444892383 2011 62.42974534699122 2012 62.41115197186065 2013 62.33510633639383 2014 62.237328211854845 2015 62.17095593524763 2016 62.16159897419381 2017 62.18895563594336 2018 62.23349142289738 2019 62.29130109115814 2020 62.30166534642412 2021 62.337385725568204 2022 62.49075232692578 2023 62.706496398829884