Year % of total population 1960 53.9562520321852 1961 53.8955118063472 1962 53.839696451803 1963 53.779000730866 1964 53.7137818769016 1965 53.6456418245832 1966 53.5746502771628 1967 53.5031296933525 1968 53.4313466700418 1969 53.3597639467027 1970 53.2871636632364 1971 53.1913623566149 1972 53.0991329086996 1973 53.0309109234127 1974 52.9618792338873 1975 52.891532768088 1976 52.8196717562718 1977 52.7479518773385 1978 52.6763991601476 1979 52.5943747376622 1980 52.4946865425043 1981 52.3900844571371 1982 52.2954256672783 1983 52.2148130883787 1984 52.146661158099 1985 52.0842871209472 1986 52.0274095059018 1987 51.9766742397607 1988 51.9303961611235 1989 51.8897212372849 1990 51.8517504135479 1991 51.8171515485413 1992 51.799018001845 1993 51.7892322305942 1994 51.7774807762789 1995 51.7635084968107 1996 51.7455833545439 1997 51.7261196428646 1998 51.704208387321 1999 51.6827409420129 2000 51.6590602195283 2001 51.6353734907923 2002 51.6213058862819 2003 51.6113246020954 2004 51.5969751176423 2005 51.5805045827917 2006 51.5584608577266 2007 51.5290629788164 2008 51.4949826671806 2009 51.4577877288446 2010 51.4194760359825 2011 51.3824854720784 2012 51.3496411461585 2013 51.3197108086829 2014 51.2913157154286 2015 51.1845605136345 2016 50.9985217644935 2017 50.8379986094349 2018 50.7156842101809 2019 50.6128272198787 2020 50.535778151853 2021 50.4817559642291 2022 50.4445879841117 2023 50.4215586112