Year % of total population 1960 54.171116304772 1961 54.3579103949133 1962 54.5063645082083 1963 54.5229410719257 1964 54.4485950018056 1965 54.2779927057236 1966 54.0020507000633 1967 53.731031452507 1968 53.46912520467 1969 53.2217529831128 1970 53.006027275709 1971 52.8377613440395 1972 52.7062699420343 1973 52.5969534283688 1974 52.5027129356218 1975 52.4107102026533 1976 52.319143014731 1977 52.255100381568 1978 52.1326013531688 1979 51.9104509026537 1980 51.6527908281769 1981 51.3773773211853 1982 51.1034185675188 1983 50.8543679746886 1984 50.6512568501314 1985 50.4903556396407 1986 50.3696165487478 1987 50.2811959942589 1988 50.2397061537173 1989 50.2386376213917 1990 50.2526398987805 1991 50.2841937923835 1992 50.3331992146643 1993 50.4019261334904 1994 50.4961680301708 1995 50.656135277065 1996 50.8629528963017 1997 51.0481534771635 1998 51.1682694063689 1999 51.1254487955596 2000 50.9759392921448 2001 50.8160903661537 2002 50.60825880711 2003 50.3860285829749 2004 50.1709927903042 2005 49.9550179671382 2006 49.7662941478003 2007 49.6343030246535 2008 49.5812226894243 2009 49.5847242297537 2010 49.6294150836759 2011 49.7193863975755 2012 49.8624484600899 2013 50.0816688508366 2014 50.376568006738 2015 50.7452664618979 2016 51.1876980448302 2017 51.6913185811642 2018 52.2444012736797 2019 52.8432775871676 2020 53.4832745408792 2021 54.1461221568384 2022 54.7986746493248 2023 55.4132571135592