Year % of total population 1960 42.0208076306922 1961 42.2575659690805 1962 42.5442881897712 1963 42.7855806136294 1964 42.9912574475745 1965 43.2307871423153 1966 43.4824152434645 1967 43.7012582463411 1968 43.8868582197176 1969 44.0415192172189 1970 44.1639692256335 1971 44.2531216332343 1972 44.3372788400947 1973 44.4274800207833 1974 44.4987551601161 1975 44.5486540642301 1976 44.6017627836046 1977 44.7040089930357 1978 44.8663932161684 1979 45.059033897312 1980 45.2028689489611 1981 45.2457516057431 1982 45.2192129830151 1983 45.1489304571907 1984 45.0802106158887 1985 45.0049090838615 1986 44.9118332379665 1987 44.825345656296 1988 44.6894836152091 1989 44.510442858754 1990 44.3350388923301 1991 44.1660311821789 1992 44.0260741904749 1993 43.9309245044797 1994 43.8713001890615 1995 43.8247226805294 1996 43.8004730666184 1997 43.8807626855406 1998 44.0406006088271 1999 44.2038532535686 2000 44.3630473029935 2001 44.5014717176462 2002 44.6172644735107 2003 44.7334383728108 2004 44.839379680849 2005 44.9334820204992 2006 45.0259542801987 2007 45.1035649375558 2008 45.2019689758159 2009 45.3314362594842 2010 45.4366206961919 2011 45.4803220868856 2012 45.4470099186074 2013 45.3457071913209 2014 45.1790045852704 2015 44.9649223675282 2016 44.7089681121174 2017 44.4601208683082 2018 44.2568677681292 2019 44.0641912433948 2020 43.8634715706682 2021 43.6846433489939 2022 43.5210966153479 2023 43.2910545171166