Year % of total population 1960 48.4964095772852 1961 48.4775016346223 1962 48.4783565807312 1963 48.4948074901521 1964 48.5137822480729 1965 48.5343689584255 1966 48.5531740514555 1967 48.5706568969605 1968 48.5875429420633 1969 48.6004142184421 1970 48.6134451638282 1971 48.6277255174728 1972 48.6300523774034 1973 48.6223229888012 1974 48.6136748284948 1975 48.6021315319898 1976 48.5873830826255 1977 48.5693670008843 1978 48.548045228471 1979 48.525366502613 1980 48.5700791638737 1981 48.6166057965175 1982 48.6007516049553 1983 48.5889541593735 1984 48.5772966902753 1985 48.56539333802 1986 48.554862869002 1987 48.544297216342 1988 48.5340568512002 1989 48.5233724277979 1990 48.5118874626671 1991 48.4988235390233 1992 48.48574472819 1993 48.4741052727533 1994 48.4598897974835 1995 48.4441802941599 1996 48.4300006609961 1997 48.4175294857516 1998 48.4041883752323 1999 48.391286493854 2000 48.3829493376595 2001 48.3795532705829 2002 48.3856861936202 2003 48.4044463077387 2004 48.4309382500832 2005 48.4495259062064 2006 48.4517730587367 2007 48.4428927579314 2008 48.4315979602132 2009 48.4205949813576 2010 48.4034655885876 2011 48.3931616778023 2012 48.4104067202363 2013 48.4402753063253 2014 48.4627891305626 2015 48.4964414634087 2016 48.5481471249859 2017 48.610075069622 2018 48.6727811023938 2019 48.7046127764812 2020 48.7187124683274 2021 48.7391908306249 2022 48.7637309821216 2023 48.7930749053325