Year % of total population 1960 49.70096574715472 1961 49.69388395444537 1962 49.68846029126781 1963 49.68544293427173 1964 49.68197698549305 1965 49.67894397116061 1966 49.67700448493717 1967 49.674270015105336 1968 49.67094128367893 1969 49.66860641767168 1970 49.66572967036958 1971 49.67189704401817 1972 49.686736791393145 1973 49.70326231884661 1974 49.72318881705089 1975 49.74255368637237 1976 49.75593077053873 1977 49.765791821342376 1978 49.77007531821275 1979 49.77335738531686 1980 49.802421595264676 1981 49.81136024314216 1982 49.777022412701115 1983 49.72740300532198 1984 49.667386490655296 1985 49.6007339652046 1986 49.56993471164668 1987 49.57957477971586 1988 49.58154614257335 1989 49.58444521269417 1990 49.5923262839604 1991 49.59971507211177 1992 49.59037348837621 1993 49.565566816511485 1994 49.54487912745465 1995 49.52455262578785 1996 49.5011582144234 1997 49.493290784683275 1998 49.50005433543843 1999 49.50603515527324 2000 49.51751614963003 2001 49.532157882753175 2002 49.548142243970354 2003 49.56707273441474 2004 49.586204291545634 2005 49.6038467000251 2006 49.6220046702039 2007 49.64100085650022 2008 49.65838065056243 2009 49.67310737386115 2010 49.687523085995224 2011 49.70215082909859 2012 49.71597682087955 2013 49.72999912132621 2014 49.74512698927418 2015 49.765764941489635 2016 49.778770359817344 2017 49.78604201896735 2018 49.797363908898916 2019 49.807048260879355 2020 49.81592706061324 2021 49.82304397242459 2022 49.829533026726466 2023 49.83688407316079