Year % of total population 1960 48.3776649486106 1961 48.4164432649738 1962 48.4519696290149 1963 48.4839268696853 1964 48.5119102758861 1965 48.538014617628 1966 48.5592876673648 1967 48.5748850113563 1968 48.5877726336147 1969 48.5958133419701 1970 48.5973484606983 1971 48.6050088007781 1972 48.6262150691774 1973 48.6493075490301 1974 48.6746874497728 1975 48.702740461071 1976 48.7229688738781 1977 48.7322108114148 1978 48.7327899200641 1979 48.7323406432417 1980 48.7358377389603 1981 48.7396507342286 1982 48.7469466941066 1983 48.7591231925671 1984 48.77063912686 1985 48.7808116159698 1986 48.7852005932772 1987 48.7847599050215 1988 48.7694592595233 1989 48.7454589290449 1990 48.7255799437031 1991 48.7014540321367 1992 48.6750723015802 1993 48.6526318228811 1994 48.6324945325084 1995 48.6103580393697 1996 48.5897991031995 1997 48.5698115929913 1998 48.5468990481759 1999 48.5177560886786 2000 48.5501162190918 2001 48.5912036206735 2002 48.5743234564658 2003 48.5577203037342 2004 48.5404332392425 2005 48.5211664865154 2006 48.4965501625943 2007 48.4687505078284 2008 48.4479328415771 2009 48.4376655496127 2010 48.4320647584305 2011 48.4248830689808 2012 48.4168021673762 2013 48.4103688745509 2014 48.4058445893968 2015 48.401142153224 2016 48.3947765854419 2017 48.3902991559505 2018 48.3888317100778 2019 48.3868474658944 2020 48.3762619519133 2021 48.3566787545677 2022 48.4120827018594 2023 48.4557220656808