Year % of total population 1960 45.2842568306301 1961 45.732357152747 1962 45.8197671258576 1963 45.6468196600768 1964 45.2658706007574 1965 44.6855697280145 1966 43.8924276003411 1967 42.9277553380087 1968 41.8029709010836 1969 40.4775251595446 1970 39.1592810369233 1971 37.9302686196861 1972 36.7048154759531 1973 35.4923045633964 1974 34.2326010328157 1975 32.8892124035522 1976 31.6044460134049 1977 30.4054549277845 1978 29.2205037726237 1979 28.1036532075553 1980 27.0812324089891 1981 26.2202497306484 1982 25.5396317593318 1983 25.0040841821089 1984 24.5660244999706 1985 24.1084261341563 1986 23.5707581152602 1987 23.01428035221 1988 22.4719354668489 1989 21.9461902604599 1990 21.5782230811966 1991 21.4577391672168 1992 21.3723863007325 1993 21.1746179139332 1994 20.9003279955715 1995 20.6870445486932 1996 20.603384126493 1997 20.4617712977506 1998 20.1176450048722 1999 19.5674428331507 2000 19.0821127626599 2001 18.9196104419985 2002 18.8175667748996 2003 18.5154505114088 2004 18.0051571263264 2005 17.4309709383119 2006 16.9429608234151 2007 16.4163318951749 2008 15.7350712073945 2009 14.9254176658609 2010 14.2509488796505 2011 13.9512404418269 2012 13.7957327484116 2013 13.5264809796982 2014 13.1255237970944 2015 12.7133046301799 2016 12.4433707468207 2017 12.2932101330092 2018 12.2073100753603 2019 12.2076382384101 2020 12.1518250106876 2021 11.9931281628928 2022 11.8395394940683 2023 11.693772098898