Year % of total population 1960 43.1761477343472 1961 43.1870116275156 1962 43.2291781305115 1963 43.3280057237511 1964 43.5463482434707 1965 43.8350326706686 1966 44.1160754902873 1967 44.3969047548199 1968 44.668272129785 1969 44.9211632281197 1970 45.1510785084272 1971 45.351428036499 1972 45.5209354561448 1973 45.6582757435076 1974 45.7652615727266 1975 45.8431354784419 1976 45.8921559566012 1977 45.9358508855786 1978 45.9718621508441 1979 45.9743992970346 1980 45.9466042695478 1981 45.899720755539 1982 45.8335484012244 1983 45.7532404385841 1984 45.6658987323334 1985 45.5719492745946 1986 45.4723681938277 1987 45.3659122923355 1988 45.255428493323 1989 45.2802500204599 1990 45.2961500518188 1991 45.1752587048605 1992 44.7575280776447 1993 44.3312430195911 1994 44.1761728997364 1995 44.227309400773 1996 44.4641659837209 1997 44.5266391281491 1998 44.4095406334793 1999 44.2397318335816 2000 44.0274196304383 2001 43.9323671235208 2002 43.9244137317074 2003 43.8744179464965 2004 43.8004218795683 2005 43.7142566435856 2006 43.6192110973882 2007 43.4983516769261 2008 43.3286792141802 2009 43.2238332687256 2010 43.2985992965849 2011 43.5442274368241 2012 43.9199711450151 2013 44.0579231565187 2014 43.9138196709282 2015 43.7465908827423 2016 43.5478944951745 2017 43.3115918225766 2018 43.0376179706824 2019 42.7228951912914 2020 42.3760951593089 2021 42.009673293934 2022 41.6056095481995 2023 41.1543333898486