Year % of total population 1960 49.30629703588266 1961 49.315525602974176 1962 49.32658846922037 1963 49.33563978236275 1964 49.343971929959025 1965 49.352434735569815 1966 49.36017604266319 1967 49.36860060891909 1968 49.377947477437786 1969 49.387438403295654 1970 49.396707024369775 1971 49.405956158832076 1972 49.41274619498189 1973 49.419468845714924 1974 49.43295605025381 1975 49.45037320803698 1976 49.46697153300646 1977 49.48312746437739 1978 49.49844369458433 1979 49.51297317346771 1980 49.527124173742585 1981 49.53815297534957 1982 49.547168297279676 1983 49.55225454779151 1984 49.555237205786334 1985 49.562328172917915 1986 49.57262601626612 1987 49.582486930261915 1988 49.5884316792877 1989 49.59845975483338 1990 49.611595301972216 1991 49.62882018549182 1992 49.64752670227816 1993 49.65725091418331 1994 49.65877799885992 1995 49.66227156215665 1996 49.67009741574139 1997 49.678309961497675 1998 49.68303496538178 1999 49.683365043168045 2000 49.69050047585756 2001 49.7041381717161 2002 49.72019722574713 2003 49.738244267947735 2004 49.7562744061942 2005 49.77302933088184 2006 49.78895716945959 2007 49.803685532408196 2008 49.817087980766615 2009 49.82967601142211 2010 49.842119450064615 2011 49.8550844284884 2012 49.86704823913208 2013 49.87638501304568 2014 49.884252009437006 2015 49.891972666243156 2016 49.89973430737127 2017 49.906539305068 2018 49.91072079405995 2019 49.91396557851201 2020 49.91755490978709 2021 49.918930833015445 2022 49.91816560635137 2023 49.91833492185846