Year % of total population 1960 50.09764597325297 1961 50.082859811908854 1962 50.06916443869218 1963 50.05682640879899 1964 50.045272732335434 1965 50.03392748640983 1966 50.023175433712595 1967 50.01308765562067 1968 50.00290822748789 1969 49.99267342875822 1970 49.98312934070618 1971 49.96564086770891 1972 49.94083311574056 1973 49.91725721531321 1974 49.894047522161046 1975 49.87182268016082 1976 49.84962846201229 1977 49.830263862262626 1978 49.81391409967155 1979 49.796752636547254 1980 49.78025915456459 1981 49.76415015537623 1982 49.74708727410719 1983 49.73099223185642 1984 49.71635636931797 1985 49.70300944606666 1986 49.69058284332628 1987 49.67799183858214 1988 49.665737508374285 1989 49.65317951345284 1990 49.63995907579539 1991 49.62593458429771 1992 49.61172374677098 1993 49.59836571280637 1994 49.58787125347004 1995 49.578885108055815 1996 49.56892944030352 1997 49.5588439905695 1998 49.54902225828381 1999 49.53917858010806 2000 49.52695387830937 2001 49.51466709048825 2002 49.503477734677496 2003 49.49223369192623 2004 49.481593242005765 2005 49.47144037746703 2006 49.461792428998734 2007 49.452235214987404 2008 49.43975136993367 2009 49.424890606202176 2010 49.411628521938106 2011 49.400617469031616 2012 49.39029327177507 2013 49.379993158853736 2014 49.37121400105502 2015 49.36280462628853 2016 49.35343702406001 2017 49.34374009425679 2018 49.33415598883411 2019 49.322480113636 2020 49.30199395972386 2021 49.273669769000506 2022 49.25144476714797 2023 49.23854917489266