Year % of total population 1960 49.43761252171881 1961 49.422678688484986 1962 49.39799120516851 1963 49.37194055273944 1964 49.341624426960244 1965 49.30789576958354 1966 49.28945155486799 1967 49.28638755724037 1968 49.279705686751214 1969 49.27049113195908 1970 49.26087599533746 1971 49.24955793797295 1972 49.23871123675141 1973 49.23230263892025 1974 49.22489392535932 1975 49.20190923641882 1976 49.169456882550634 1977 49.12937696922988 1978 49.08009481307184 1979 49.03497410527674 1980 48.99795473252046 1981 48.935470561502775 1982 48.89404935572668 1983 48.89549305072836 1984 48.892717826530706 1985 48.88634668802754 1986 48.88046920608606 1987 48.875994558031984 1988 48.868024408961894 1989 48.85443027458394 1990 48.85376505948862 1991 48.84212985263767 1992 48.81781755931037 1993 48.794789517867414 1994 48.77541480308311 1995 48.76503354088718 1996 48.75038457120831 1997 48.726851107443544 1998 48.71059503315857 1999 48.703007382248956 2000 48.69945658616219 2001 48.69907347831976 2002 48.696354877026906 2003 48.68665955803501 2004 48.67721444891194 2005 48.64865941387964 2006 48.573866273548724 2007 48.472226441144 2008 48.36958820043555 2009 48.286353704659064 2010 48.247355058579224 2011 48.23250569259842 2012 48.21940951765227 2013 48.21148494839692 2014 48.20374267816793 2015 48.1698232369356 2016 48.12949920029859 2017 48.121550202735406 2018 48.1327130403406 2019 48.15989534033359 2020 48.22481477581962 2021 48.29095620995566 2022 48.32702390713798 2023 48.358582339278975