Year % of total population 1960 44.1203164998836 1961 43.9226844254261 1962 43.7297308906596 1963 43.52615951674 1964 43.3731604254699 1965 43.407510239355 1966 43.584274944722 1967 43.7747590122805 1968 43.9605069398753 1969 44.1417386808479 1970 44.3139237700774 1971 44.4762522288864 1972 44.630509972191 1973 44.7716500353867 1974 44.8915559410415 1975 44.9908069507603 1976 45.0659386665736 1977 45.1159206977962 1978 45.1460896112059 1979 45.1551232268801 1980 45.1371555684451 1981 45.0890084262091 1982 45.0135169384134 1983 44.9143450753347 1984 44.7901579588467 1985 44.6417475025517 1986 44.4759483885261 1987 44.2981214844165 1988 44.110387665043 1989 43.9156520729567 1990 43.7187431508896 1991 43.5182754434617 1992 43.302794543936 1993 43.0514347696982 1994 42.7852649053093 1995 42.4873157316693 1996 42.1028342555406 1997 41.3839912786432 1998 40.532867092615 1999 39.8942270400113 2000 39.4079774133882 2001 38.9518877112126 2002 38.5363093589954 2003 38.3532094676288 2004 38.304171814075 2005 38.1673720590014 2006 37.8533354822294 2007 37.4270685486294 2008 36.9812750457024 2009 36.5333374764039 2010 36.1107681194344 2011 35.690782714327 2012 35.2806491483517 2013 34.8578984875264 2014 34.3906726054799 2015 33.8811876465204 2016 33.338789742407 2017 32.7723369535176 2018 32.2045160887554 2019 31.6695903329069 2020 31.1910864133207 2021 30.7706745239393 2022 30.3924214557097 2023 30.0424698041145