Year	% of total population
1960	2.73853148454204
1961	2.74950310551446
1962	2.75934413186506
1963	2.76824817728397
1964	2.77681321758611
1965	2.78574658291704
1966	2.79478583624711
1967	2.80398201312428
1968	2.81307660407372
1969	2.82205746512214
1970	2.82998081256744
1971	2.83759540634906
1972	2.84611549120646
1973	2.85451818912254
1974	2.92526189099418
1975	3.05510279666313
1976	3.1826515343938
1977	3.31099467123973
1978	3.43779997444181
1979	3.55740806007293
1980	3.6672045288974
1981	3.76046986858649
1982	3.83750807005852
1983	3.91785439996581
1984	3.93677971043837
1985	3.89668424345339
1986	3.87134693693896
1987	3.86031391432865
1988	3.85882308861961
1989	3.85848407373176
1990	3.85632349316342
1991	3.85178711182646
1992	3.83271119036688
1993	3.77524429549216
1994	3.70695320646912
1995	3.66983334198765
1996	3.65101206345235
1997	3.63226479534579
1998	3.61173848187826
1999	3.58872437431033
2000	3.56209466317088
2001	3.53188804349185
2002	3.49837162438474
2003	3.42191607124501
2004	3.3120997379398
2005	3.2138056141771
2006	3.12523739345782
2007	3.04716996900929
2008	2.98062417143471
2009	2.92406924161888
2010	2.87419184163322
2011	2.82977982316191
2012	2.78661377360852
2013	2.73292077466404
2014	2.66416143487105
2015	2.59820379041011
2016	2.54796132669286
2017	2.50980448151474
2018	2.4824579826992
2019	2.46818953530525
2020	2.45499699882867
2021	2.43613858095079
2022	2.42607886497817
2023	2.43773547076845