Year % of total population 1960 49.65331207187936 1961 49.60048748480707 1962 49.541515035123155 1963 49.48588418024001 1964 49.43251075110067 1965 49.3574153619045 1966 49.247763137076134 1967 49.13097331344037 1968 49.04720408627201 1969 49.0099526857917 1970 49.01661639755566 1971 49.042935443120626 1972 49.051807277539 1973 49.0408897874562 1974 49.02032447801886 1975 48.99593815040651 1976 48.96979590197231 1977 48.94165020945785 1978 48.911335364228904 1979 48.888233768071856 1980 48.875518838473006 1981 48.87195381140763 1982 48.87559271479203 1983 48.88509364415063 1984 48.89915837848097 1985 48.91578782344199 1986 48.935413652951986 1987 48.95360075308391 1988 48.970977476636996 1989 48.99285907950756 1990 49.01767007341186 1991 49.044841421584614 1992 49.071024141227866 1993 49.09112194663155 1994 49.10926548832222 1995 49.1287297339885 1996 49.149011338621676 1997 49.17051759711414 1998 49.195613539169244 1999 49.22743130231993 2000 49.25837833628733 2001 49.27652904449667 2002 49.27817421111233 2003 49.275651351430085 2004 49.281124740387185 2005 49.289221677329756 2006 49.294282858939525 2007 49.29433064363268 2008 49.291598780964065 2009 49.288166218577615 2010 49.28495842829938 2011 49.30579050676542 2012 49.34882290738595 2013 49.3896279856279 2014 49.42663794399408 2015 49.45951459461216 2016 49.4915636561163 2017 49.522851387283616 2018 49.55072228234919 2019 49.57479123544725 2020 49.576147922886896 2021 49.55361753489226 2022 49.53211016708977 2023 49.52053267540402