Year % of total population 1960 51.6877192885664 1961 51.6689306003339 1962 51.6495292119998 1963 51.6291859840651 1964 51.607159604773 1965 51.5816640335749 1966 51.5494294293963 1967 51.5092556774207 1968 51.4627590639653 1969 51.4095145948309 1970 51.3493559662655 1971 51.2816247335617 1972 51.2056321351548 1973 51.1228580587307 1974 51.0364259867343 1975 50.9502522320485 1976 50.8665064547409 1977 50.7861558456015 1978 50.7103800271135 1979 50.6408937582928 1980 50.5814773014082 1981 50.5330066076955 1982 50.4962432262139 1983 50.4726585679235 1984 50.4554329975858 1985 50.4382993110679 1986 50.428107837677 1987 50.4234398576673 1988 50.4219056666338 1989 50.4266908862076 1990 50.4397560470906 1991 50.4623104282929 1992 50.6698973040861 1993 51.0683160786217 1994 51.3399675201271 1995 51.4061623873125 1996 51.3506618000993 1997 51.2912859199733 1998 51.2534085173505 1999 51.2308410229294 2000 51.2203093782526 2001 51.2154189865295 2002 51.2010499212797 2003 51.1891823545201 2004 51.1938612456129 2005 51.2030514640242 2006 51.2145627273547 2007 51.2175276879824 2008 51.2139295307187 2009 51.2136161433821 2010 51.2143776265465 2011 51.2132320921835 2012 51.2159622292124 2013 51.1922542244646 2014 51.1285979432483 2015 51.0567984101348 2016 50.9889152096561 2017 50.9299490963298 2018 50.8772461280146 2019 50.8287383235274 2020 50.7940406345575 2021 50.7735842538375 2022 50.7716035065127 2023 50.7805884241759