Year % of total population 1960 49.401986512102 1961 49.4105933006074 1962 49.4196850276212 1963 49.4299110354946 1964 49.4410755900279 1965 49.4527547749775 1966 49.4654692556806 1967 49.4787040600022 1968 49.4925976721004 1969 49.5066828459193 1970 49.5200149369533 1971 49.5325934150047 1972 49.5442310201508 1973 49.5547849292205 1974 49.5647980065243 1975 49.5745704656935 1976 49.6273856955963 1977 49.723746054735 1978 49.8217000562563 1979 49.9207431278288 1980 50.0196250863255 1981 50.118065882565 1982 50.2148818605669 1983 50.3091462977191 1984 50.4011035300439 1985 50.4906828040696 1986 50.5779656615051 1987 50.6619528871836 1988 50.7199024549955 1989 50.7125081999288 1990 50.6663947051514 1991 50.6234532713699 1992 50.5847960057853 1993 50.549375134746 1994 50.5142660682267 1995 50.4672985614211 1996 50.418037977506 1997 50.3786643350011 1998 50.3442975991431 1999 50.3175337039307 2000 50.297805100594 2001 50.2644239334806 2002 50.2334983951755 2003 50.2229415067543 2004 50.2144764039505 2005 50.2070407148393 2006 50.1987028543538 2007 50.1896781881396 2008 50.1807047002026 2009 50.1710358546535 2010 50.16048052528 2011 50.1517744422997 2012 50.1445329505379 2013 50.1312044657411 2014 50.1069865510362 2015 50.0861426259609 2016 50.0731315366472 2017 50.0553861006604 2018 50.0366257227986 2019 50.0228436549541 2020 50.0106681240197 2021 49.9945576027358 2022 49.9781328461857 2023 49.968174856308