Year % of total population 1960 50.7658030645781 1961 50.749279974982 1962 50.7239288298855 1963 50.7015642296136 1964 50.6885086341204 1965 50.6705326843175 1966 50.633989006788 1967 50.589378599479 1968 50.5473933199674 1969 50.509326796698 1970 50.4770569472101 1971 50.4528927876998 1972 50.4409993514715 1973 50.4545070346778 1974 50.6661424485611 1975 50.8739778784524 1976 50.7801278534309 1977 50.5752467192961 1978 50.3732821265861 1979 50.1724956857467 1980 49.9710743132541 1981 49.7697804036847 1982 49.6145653644573 1983 49.5498793600357 1984 49.5268717398614 1985 49.5022305320475 1986 49.4766264126783 1987 49.4490881710575 1988 49.4239390823734 1989 49.4010998055536 1990 49.3760304375396 1991 49.3464203608986 1992 49.3235081086484 1993 49.3302549922154 1994 49.3564996613156 1995 49.3812745095766 1996 49.4084480795584 1997 49.4395919199618 1998 49.4734655500405 1999 49.5086947187634 2000 49.5426776217338 2001 49.5755728988526 2002 49.6063914053639 2003 49.6360273904134 2004 49.6667268750663 2005 49.6962573115204 2006 49.7249483152966 2007 49.7534624671632 2008 49.7823121778852 2009 49.8124168522396 2010 49.8450896974912 2011 49.8698787689309 2012 49.8800749812374 2013 49.8847440546785 2014 49.8885721689557 2015 49.8906744828516 2016 49.8954403651114 2017 49.9033117284487 2018 49.9036371736525 2019 49.900800432279 2020 49.9059826090048 2021 49.9148038720836 2022 49.9176180674525 2023 49.9143744574007