Year	% of total population
1960	1.12276696809744
1961	1.18062877764082
1962	1.2368947748862
1963	1.29048941101008
1964	1.3408276868084
1965	1.3876690997759
1966	1.43126405856632
1967	1.47143289445143
1968	1.50859407900195
1969	1.54392726820482
1970	1.57757187387306
1971	1.60882664252692
1972	1.63854627330189
1973	1.66824722861409
1974	1.69853089888559
1975	1.73034105369298
1976	1.76248927902679
1977	1.79413320823671
1978	1.82597402463294
1979	1.85755279451338
1980	1.88784478397428
1981	1.916878381694
1982	1.94505385108308
1983	1.97228108358303
1984	1.99726879641851
1985	2.01984148157001
1986	2.04189467189418
1987	2.06393795346641
1988	2.08577532288249
1989	2.1064923623796
1990	2.12561786580813
1991	2.14235902467509
1992	2.15616497471161
1993	2.16849568773375
1994	2.18075366335088
1995	2.19244738989834
1996	2.20290037268212
1997	2.21294598797946
1998	2.22272020429446
1999	2.23131087165397
2000	2.23884539389202
2001	2.24587185396915
2002	2.25288488536222
2003	2.26081124724964
2004	2.2714642293797
2005	2.2850735370777
2006	2.30077704970881
2007	2.31897868910549
2008	2.33975020212485
2009	2.36195290971426
2010	2.38382918176487
2011	2.40218891134884
2012	2.41230467817734
2013	2.40607254551887
2014	2.38302532715494
2015	2.37659505674746
2016	2.39150485693281
2017	2.40660997863549
2018	2.42163527240795
2019	2.43636874576986
2020	2.43561192051078
2021	2.41935305033651
2022	2.40380442954075
2023	2.39805817355193