Year % of total population 1960 47.971896712325446 1961 48.00352960914488 1962 48.03652490744595 1963 48.07071080114227 1964 48.1043393307115 1965 48.13710044601299 1966 48.16789733457075 1967 48.196626180321225 1968 48.22184550937641 1969 48.24150854374211 1970 48.26041541227666 1971 48.28226096141014 1972 48.30172894145619 1973 48.316940600354435 1974 48.332233605648355 1975 48.34465383326633 1976 48.3527433637019 1977 48.36034227295113 1978 48.36632279687944 1979 48.37068729578061 1980 48.38786532357338 1981 48.406995218587866 1982 48.41519406461521 1983 48.424211411038335 1984 48.43358034035446 1985 48.44382196355749 1986 48.4574906004349 1987 48.47351599052962 1988 48.489938192711826 1989 48.50769591857152 1990 48.52764510559488 1991 48.54907195117421 1992 48.56971846549678 1993 48.58900445196689 1994 48.605293003692964 1995 48.61710871811303 1996 48.62539914687408 1997 48.63125515509084 1998 48.63475385683881 1999 48.636281624547046 2000 48.63737201523918 2001 48.63896348842728 2002 48.64698202070659 2003 48.66226405916543 2004 48.68118695596606 2005 48.701906899023406 2006 48.71923900866609 2007 48.73563896113788 2008 48.75110571047632 2009 48.760472295763584 2010 48.76620364076808 2011 48.77200809301828 2012 48.7815177901803 2013 48.79176460245414 2014 48.802342434868685 2015 48.820675088819016 2016 48.84178319422966 2017 48.85950564979863 2018 48.87510993151105 2019 48.88579002001537 2020 48.892636044339284 2021 48.89744664994766 2022 48.90335665392363 2023 48.91136688251798