Year % of total population 1960 55.20801947058826 1961 54.92507275878553 1962 54.644053665448645 1963 54.36219817607836 1964 54.15329159611908 1965 54.04615424923642 1966 53.982104150806116 1967 53.95505392884078 1968 53.95861629336167 1969 53.982376682393955 1970 54.028102787347365 1971 54.076698020404145 1972 54.13362414848089 1973 54.20363448129605 1974 54.27925252819963 1975 54.37313614478832 1976 54.47027150705067 1977 54.57526092351931 1978 54.69193656080982 1979 54.796474573321944 1980 54.89738786666188 1981 54.98898689500709 1982 55.063832162248374 1983 55.13398924882083 1984 55.19804695280542 1985 55.27066813467882 1986 55.36174874167856 1987 55.47308501226754 1988 55.61286873357218 1989 55.77025872594996 1990 55.93121516002906 1991 56.11226447739 1992 56.29170229924335 1993 56.486377686056755 1994 56.71344306930926 1995 56.97136039704786 1996 57.26367066140322 1997 57.576582244621406 1998 57.90724343532327 1999 58.24585168877549 2000 58.5791487501655 2001 58.90265073424689 2002 59.207964152022655 2003 59.50645315438756 2004 59.81411902343535 2005 60.12456513172937 2006 60.43367445017919 2007 60.742762193224294 2008 61.039737936922826 2009 61.32531988465617 2010 61.605030886215914 2011 61.86911870080489 2012 62.11296413626425 2013 62.34472711063142 2014 62.56386857013267 2015 62.76745148129438 2016 62.97336933595771 2017 63.185940508062835 2018 63.38718222678941 2019 63.57596344366865 2020 63.77553795781755 2021 63.989326312098726 2022 64.19747934697475 2023 64.38085680501877