Year % of total population 1960 48.4508137794487 1961 48.4992119280726 1962 48.5449735449735 1963 48.5836695192632 1964 48.5912681737961 1965 48.5801730952429 1966 48.5671825656769 1967 48.5513467616397 1968 48.5304829193678 1969 48.508387300862 1970 48.4752864934558 1971 48.4292593441871 1972 48.2994219378919 1973 48.0933352689043 1974 47.8887911990484 1975 47.691889611179 1976 47.4999307268143 1977 47.2944224096854 1978 47.234706819734 1979 47.3269299899724 1980 47.4127549804085 1981 47.493072496033 1982 47.5688728540865 1983 47.6189944258889 1984 47.6434101754884 1985 47.6617727025557 1986 47.6789319236613 1987 47.6927297110578 1988 47.7049667889362 1989 47.7356453713251 1990 47.7845837537721 1991 47.8328475148995 1992 47.8815778090438 1993 47.9294992713912 1994 47.975246176685 1995 48.0194084149218 1996 48.0604960265999 1997 48.1216218477552 1998 48.1978903335776 1999 48.2702039129572 2000 48.3439406680031 2001 48.414618367451 2002 48.4774462928875 2003 48.5197949637691 2004 48.5464115119117 2005 48.5711650557072 2006 48.6014965387539 2007 48.6497853892112 2008 48.7075756171629 2009 48.7606409170938 2010 48.8163699663129 2011 48.8714002769355 2012 48.926318287134 2013 48.9883068547939 2014 49.0532060592052 2015 49.1142511489545 2016 49.1754133153461 2017 49.2293112201726 2018 49.2748802107484 2019 49.3195247516824 2020 49.3667196608373 2021 49.4207846542469 2022 49.4598062550812 2023 49.4803672718796