Year % of total population 1960 42.97306709179546 1961 43.06621754733978 1962 43.173103644381264 1963 43.312754100325 1964 43.487614176942266 1965 43.654481271372624 1966 43.799086979266946 1967 43.93859516057164 1968 44.071105214204294 1969 44.20072317333727 1970 44.33261667060893 1971 44.46633335913462 1972 44.59821588420805 1973 44.708387825471235 1974 44.792746683297885 1975 44.8730114553214 1976 44.95683324599551 1977 45.02657076126736 1978 45.078577519733635 1979 45.135175362842745 1980 45.192832838358235 1981 45.26301301464843 1982 45.337360052025424 1983 45.39595386538636 1984 45.44409083262326 1985 45.48101695612702 1986 45.508729790061324 1987 45.5349003683709 1988 45.546495553131976 1989 45.54246059110796 1990 45.5332723199495 1991 45.51317951646702 1992 45.48403082815204 1993 45.450827486297946 1994 45.348405121430226 1995 45.21561072178501 1996 45.13680274735204 1997 45.05090195094731 1998 44.91289303399188 1999 44.75667121601831 2000 44.61415406947317 2001 44.47941837889241 2002 44.35132845655908 2003 44.22910243626102 2004 44.11594505626073 2005 44.022449850955994 2006 43.94630730536892 2007 43.87783001639812 2008 43.81774633592979 2009 43.759632928583116 2010 43.69401117156094 2011 43.62286743239275 2012 43.554236723937606 2013 43.47597463088253 2014 43.368652701609314 2015 43.228468488497924 2016 43.08131107209916 2017 42.92092586529154 2018 42.73054971504796 2019 42.52210512316499 2020 42.296705814453254 2021 42.06562739916482 2022 41.824848008073445 2023 41.55458408145995