Year % of total population 1960 45.1174919155695 1961 45.191452171456 1962 45.2088173410596 1963 45.1108124391713 1964 44.850994558354 1965 44.768864225933 1966 44.914123136913 1967 44.8496228737337 1968 44.566615162239 1969 44.2137383099051 1970 43.809976047442 1971 43.3853770100172 1972 42.9600306951429 1973 42.5443024431781 1974 42.1632695774689 1975 41.8494795178345 1976 41.6336610614507 1977 41.6891539552005 1978 41.9235095824295 1979 42.1324090987288 1980 42.3382924650443 1981 42.536427448557 1982 42.715327005729 1983 42.8702352628288 1984 43.0080844510182 1985 43.0475531283846 1986 42.8132303245043 1987 42.6135370369389 1988 42.6217012654198 1989 42.5956720407517 1990 42.501794055243 1991 42.3438905345941 1992 42.1362954242303 1993 41.8841535143873 1994 41.5802384748163 1995 41.2436723742082 1996 40.9117448106808 1997 40.5298699139223 1998 40.0811778978958 1999 39.6190935608148 2000 39.1643525815183 2001 38.7483601929108 2002 38.3657145174286 2003 38.01109366141 2004 37.6907943249266 2005 37.395343638997 2006 37.1251732615668 2007 36.8115898188272 2008 36.5236876843189 2009 36.3277305194337 2010 36.1155151880092 2011 35.8809163279843 2012 35.6485415516874 2013 35.4442043483932 2014 35.2793292423192 2015 35.1332451113879 2016 34.9877464699385 2017 34.8118991051853 2018 34.6012110006428 2019 34.3957174850266 2020 34.2274521982166 2021 34.0985980654008 2022 33.9801949453677 2023 33.8360330727465