Year % of total population 1960 52.9757041496452 1961 52.872082773494 1962 52.6915329878337 1963 52.5227344992051 1964 52.3632586537406 1965 52.2112463924205 1966 52.0692344461496 1967 51.9374012489655 1968 51.8092578312249 1969 51.6903995943374 1970 51.5830768402259 1971 51.5135135135135 1972 51.4774622316786 1973 51.4423057271207 1974 51.408780114785 1975 51.377230968473 1976 51.3438208399937 1977 51.3095652940163 1978 51.2790378034254 1979 51.2511195479008 1980 51.2664892043774 1981 51.3232083680168 1982 51.380054920553 1983 51.441882224518 1984 51.5110055620552 1985 51.582134922512 1986 51.6573131555521 1987 51.7378428325098 1988 51.8155679736592 1989 51.8895961106667 1990 51.9079221842792 1991 51.8966700333845 1992 51.9130555085853 1993 51.9343282438361 1994 51.9597878584093 1995 51.9845369667903 1996 52.0074735628422 1997 52.0305899158132 1998 52.0478527700442 1999 52.0573872884885 2000 52.0662593470039 2001 52.0843931463541 2002 52.1082359122554 2003 52.1344005024318 2004 52.1632744269194 2005 52.1933226212256 2006 52.2266802255709 2007 52.257187486185 2008 52.2794212041741 2009 52.3019383398286 2010 52.2982334162083 2011 52.2669028553175 2012 52.2388005662625 2013 52.213533671645 2014 52.1901453369995 2015 52.1689567503227 2016 52.1498372504477 2017 52.1306507824505 2018 52.1123537656246 2019 52.0940109929331 2020 52.0729052737332 2021 52.0504978662874 2022 52.0354359365846 2023 52.0257451373251