Year % of total population 1960 48.8858295799326 1961 49.000292445002 1962 49.1418026059469 1963 49.2753990450566 1964 49.4027640128604 1965 49.521163617633 1966 49.6283008577174 1967 49.7280822036186 1968 49.8199961226644 1969 49.8994363172962 1970 49.9591114541529 1971 49.969436411378 1972 49.9626626316257 1973 49.9808398645374 1974 50.0033723228973 1975 50.0161510729641 1976 50.0004567510952 1977 50.0239157633054 1978 50.1038050815042 1979 50.1864806014411 1980 50.2621437431639 1981 50.3153371500439 1982 50.375471514606 1983 50.4761774199598 1984 50.5330303113655 1985 50.5270321972556 1986 50.5205744018508 1987 50.5106286934544 1988 50.497635682683 1989 50.4823833626519 1990 50.4633655946514 1991 50.4411754217242 1992 50.4180759124684 1993 50.3917203653794 1994 50.3860076496166 1995 50.4001462479745 1996 50.4090840567787 1997 50.4077832104594 1998 50.398200174964 1999 50.3884304730651 2000 50.3713406349861 2001 50.3455385305406 2002 50.3200354402373 2003 50.2980049146924 2004 50.277630636903 2005 50.2581527603452 2006 50.2385990207366 2007 50.2209941488895 2008 50.2045150130393 2009 50.1891805949654 2010 50.1744750352878 2011 50.1605494723506 2012 50.1524009185531 2013 50.1449360026596 2014 50.1376383432215 2015 50.131985662122 2016 50.1273604726865 2017 50.1242428511804 2018 50.1208024802595 2019 50.1188587504271 2020 50.1208359709377 2021 50.1248148548941 2022 50.1279160183141 2023 50.1303133449007