Year % of total population 1960 50.663887524977866 1961 50.651501452666196 1962 50.64467617552928 1963 50.64260718392612 1964 50.64098383195721 1965 50.637272054607315 1966 50.63312216555025 1967 50.6301426431528 1968 50.6278326804963 1969 50.626797522678075 1970 50.627561699146874 1971 50.62615200669269 1972 50.627279278083606 1973 50.6338779415667 1974 50.63979955986295 1975 50.64167071018675 1976 50.6377090330947 1977 50.63274918363048 1978 50.62765147311548 1979 50.620540671303274 1980 50.61738376985002 1981 50.61641188841529 1982 50.61038200504349 1983 50.60011222187809 1984 50.588768117174546 1985 50.57701582365892 1986 50.570053123076136 1987 50.568965737031675 1988 50.567824377604985 1989 50.56892264421476 1990 50.572617142412575 1991 50.57736701781472 1992 50.58005262348753 1993 50.58008629867959 1994 50.58141972540373 1995 50.58355143931738 1996 50.58532418593232 1997 50.58911110944596 1998 50.59311186949757 1999 50.59616352539585 2000 50.60053192532393 2001 50.603820299362106 2002 50.605094142641114 2003 50.60615907391029 2004 50.60682969305317 2005 50.60620672862112 2006 50.60387751266391 2007 50.60034793235815 2008 50.5949477211384 2009 50.588461773188605 2010 50.58280650167215 2011 50.5777103373754 2012 50.57258527419065 2013 50.56710449305551 2014 50.562149573905714 2015 50.55502491508059 2016 50.54345688204011 2017 50.530672881527394 2018 50.51794111017167 2019 50.50429628637244 2020 50.488684147675286 2021 50.47027113756785 2022 50.45406091763706 2023 50.43818850095515