Year % of total population 1960 49.176066074746 1961 49.182020262815 1962 49.1844315593879 1963 49.1836019681746 1964 49.1776914323379 1965 49.1674935702502 1966 49.1501739726859 1967 49.1280686260703 1968 49.0856199384002 1969 49.0343358600386 1970 48.9926184236538 1971 48.9549876989392 1972 48.9067842839498 1973 48.8612788750671 1974 48.8239840703107 1975 48.8056385217201 1976 48.8208650965326 1977 48.8433763708273 1978 48.8639734975669 1979 48.8029444860141 1980 48.7358696064644 1981 48.7416193036476 1982 48.7471678473418 1983 48.7511595040462 1984 48.7564877435722 1985 48.7644469533715 1986 48.7698629820594 1987 48.7732462949891 1988 48.7793873447367 1989 48.7924722133249 1990 48.8107032974486 1991 48.8274329486671 1992 48.8421908477595 1993 48.8529408025033 1994 48.8599474377536 1995 48.8688800610528 1996 48.8804632875997 1997 48.8931344163658 1998 48.9083298266279 1999 48.912981132886 2000 48.9259585639914 2001 48.9598401118087 2002 48.9952358506406 2003 49.030451670787 2004 49.0655764371001 2005 49.1016145311229 2006 49.137733794868 2007 49.1728436387185 2008 49.2061478944164 2009 49.2309921115872 2010 49.2481542256941 2011 49.2650277421562 2012 49.2827318152028 2013 49.300913585528 2014 49.3183114327948 2015 49.3337892543944 2016 49.3467795841505 2017 49.3578374700775 2018 49.3669069781138 2019 49.3736212463163 2020 49.3810733172417 2021 49.3866414391123 2022 49.3969243704066 2023 49.4140874447888