Year	% of cohort
1960	23.309844
1961	32.51377
1962	47.087501
1963	47.971833
1964	49.124416
1965	50.416924
1966	51.420443
1967	52.532423
1968	53.614789
1969	54.695269
1970	56.055724
1971	57.48167
1972	58.955017
1973	60.722675
1974	62.228952
1975	63.546288
1976	64.9901
1977	66.289261
1978	67.483856
1979	68.613067
1980	69.625842
1981	70.653671
1982	71.55625
1983	72.426801
1984	73.169129
1985	73.876326
1986	74.547066
1987	75.260942
1988	75.825602
1989	76.2781
1990	76.481811
1991	76.385206
1992	77.404104
1993	78.30804
1994	78.610188
1995	79.458558
1996	79.768618
1997	80.380484
1998	81.336252
1999	81.365846
2000	82.215891
2001	83.624986
2002	84.14683
2003	84.687508
2004	85.200431
2005	85.698883
2006	86.140699
2007	86.551366
2008	86.538239
2009	87.258829
2010	87.566831
2011	87.954683
2012	88.354565
2013	88.656018
2014	89.004085
2015	89.261519
2016	89.519576
2017	89.765278
2018	90.058264
2019	90.228562
2020	90.481335
2021	90.671103
2022	90.781947