Year % of total population 1960 52.5760330873177 1961 52.3544930310742 1962 52.145487078903 1963 51.9438615492227 1964 51.7461939080319 1965 51.5536368107547 1966 51.3732155727917 1967 51.1930240935772 1968 51.0181916915558 1969 50.850441694294 1970 50.6881036776729 1971 50.5321016258939 1972 50.3773191991512 1973 50.2295828264197 1974 50.0869345611019 1975 49.9427218205797 1976 49.7989666599815 1977 49.6573427236277 1978 49.5142889416017 1979 49.3581706929137 1980 49.1998511350949 1981 49.1427198195783 1982 49.1805384770679 1983 49.2204879471938 1984 49.2581279627297 1985 49.287685066633 1986 49.3132114769993 1987 49.3370314037756 1988 49.3638245476284 1989 49.3936965811966 1990 49.4359348191347 1991 49.4085830821068 1992 49.3384677889456 1993 49.3016255797784 1994 49.2584076388401 1995 49.2161087462995 1996 49.1757809082159 1997 49.1336763624908 1998 49.0912276091622 1999 49.0591692618097 2000 49.0365775438658 2001 49.0140002287907 2002 48.9969149405024 2003 48.9753156275418 2004 48.9432367149758 2005 48.9071160179574 2006 48.8786380320748 2007 48.8549411679781 2008 48.8333514630697 2009 48.8164603058995 2010 48.7988070406558 2011 48.7806224299237 2012 48.7680763857406 2013 48.7640763145649 2014 48.7681457647411 2015 48.7819537574426 2016 48.7943904947954 2017 48.8142947825181 2018 48.8454706927176 2019 48.8810948877283 2020 48.9324489639881 2021 49.0003067131848 2022 49.0822334244045 2023 49.1677756562325