Year % of total population 1960 52.554091065667 1961 52.5005825396747 1962 52.4276384676266 1963 52.3498913269326 1964 52.2766201822601 1965 52.2099154633284 1966 52.1443391382038 1967 52.0793378122389 1968 52.0149225002887 1969 51.9530230585354 1970 51.89698877726 1971 51.8602685880125 1972 51.8438907187566 1973 51.8296884085005 1974 51.8127413277482 1975 51.7957187608005 1976 51.780514555699 1977 51.763242899119 1978 51.7447181316701 1979 51.7266043898026 1980 51.709902869734 1981 51.7011250730567 1982 51.7014911128677 1983 51.7091894938866 1984 51.7200038454796 1985 51.7283323380373 1986 51.7345819193182 1987 51.7420079888329 1988 51.7516141422269 1989 51.7614560292499 1990 51.7722847256629 1991 51.7588477618571 1992 51.7153273675013 1993 51.667959541795 1994 51.6204532478612 1995 51.5722919824459 1996 51.5257951229412 1997 51.4811832982549 1998 51.4353870860176 1999 51.3905775726352 2000 51.3498953555819 2001 51.3142835236751 2002 51.2650427192306 2003 51.1946500748211 2004 51.1192845073075 2005 51.0370225531206 2006 50.9516431015559 2007 50.86967416936 2008 50.7859017036597 2009 50.694033666768 2010 50.5994545243323 2011 50.5418908103937 2012 50.5160064445233 2013 50.4921408973477 2014 50.4680910127971 2015 50.3937791165392 2016 50.2750691380944 2017 50.1580257644901 2018 50.0411220917754 2019 49.9233044993589 2020 49.8027758246086 2021 49.7420036708329 2022 49.7314425023728 2023 49.7103565405074