Year % of total population 1960 49.1738576352522 1961 49.2055197718761 1962 49.2370043764823 1963 49.2654259367175 1964 49.2941529321437 1965 49.3207875808331 1966 49.3426936490709 1967 49.361054814379 1968 49.3836757008359 1969 49.4110625464486 1970 49.4357767903405 1971 49.4600424148988 1972 49.4894009529794 1973 49.5179027294204 1974 49.5409383615262 1975 49.5637665658325 1976 49.5860274641145 1977 49.6052422088424 1978 49.6166234467302 1979 49.6119021729713 1980 49.5571354017604 1981 49.4649571437836 1982 49.3785634891684 1983 49.376735799737 1984 49.3778519237801 1985 49.4026772708895 1986 49.4736169663616 1987 49.5509247838589 1988 49.5558813107973 1989 49.483557862434 1990 49.4521028228179 1991 49.4199154167584 1992 49.3856560613005 1993 49.4266416012889 1994 49.5470908943051 1995 49.5917205166179 1996 49.4977237690584 1997 49.4290225907468 1998 49.4279496377454 1999 49.428187153035 2000 49.4456689855507 2001 49.4464536514722 2002 49.4312038079602 2003 49.4091672885766 2004 49.3810373844666 2005 49.3559110338733 2006 49.3321491723348 2007 49.309250486684 2008 49.2774629979638 2009 49.2127029721802 2010 49.159399091037 2011 49.1455656775134 2012 49.1428800783792 2013 49.1539397400513 2014 49.169991698441 2015 49.2180273602734 2016 49.2873783850028 2017 49.3413372150143 2018 49.3701382170558 2019 49.3772599974356 2020 49.3893396914631 2021 49.4078882456647 2022 49.4229679469285 2023 49.433785996303