Year % of total population 1960 53.4206441078354 1961 53.3921064832293 1962 53.3539852267517 1963 53.3069876686233 1964 53.2546760996276 1965 53.1861701308191 1966 53.1014642572586 1967 53.0166643391819 1968 52.9641312534665 1969 52.929405951401 1970 52.887378553122 1971 52.8378387208925 1972 52.7762843047081 1973 52.7111138771599 1974 52.704938640495 1975 52.7563420838477 1976 52.7776716395335 1977 52.766033539518 1978 52.7617939567863 1979 52.7663335621514 1980 52.7513457658706 1981 52.6982087451806 1982 52.6502026273201 1983 52.6197396254321 1984 52.5799546818621 1985 52.5294514205948 1986 52.4665109429478 1987 52.4018076219101 1988 52.3317520159193 1989 52.2450022580545 1990 52.1330939013475 1991 52.0168424570616 1992 51.9219683257457 1993 51.8456403430721 1994 51.7901192950797 1995 51.7613034672422 1996 51.7453353155632 1997 51.7289304894521 1998 51.7065616230572 1999 51.6752744864871 2000 51.6346692086865 2001 51.5768022044807 2002 51.5134685119134 2003 51.4711018479566 2004 51.4349086555895 2005 51.3892491510306 2006 51.356092331142 2007 51.3442644611839 2008 51.3349086800821 2009 51.3191460798868 2010 51.3042655780717 2011 51.2783987987415 2012 51.2346023915383 2013 51.183914597244 2014 51.114653221728 2015 50.9812238954802 2016 50.8673108538936 2017 50.8327710521267 2018 50.8195621679421 2019 50.811064038721 2020 50.7974773055051 2021 50.783785667964 2022 50.7673874619013 2023 50.7461803602204