Year	% of cohort
1960	56.242307
1961	58.539819
1962	60.417463
1963	62.562082
1964	64.575006
1965	66.634203
1966	68.522644
1967	69.77744
1968	71.034994
1969	72.026521
1970	72.68795
1971	73.028932
1972	72.732839
1973	73.215516
1974	74.052709
1975	74.510213
1976	74.442269
1977	74.825977
1978	74.459223
1979	74.176937
1980	74.512649
1981	74.649354
1982	74.652979
1983	75.119619
1984	75.427045
1985	75.873082
1986	76.339225
1987	77.028403
1988	78.561818
1989	79.475563
1990	79.37776
1991	80.350584
1992	79.595391
1993	78.977697
1994	78.227121
1995	78.461859
1996	77.403746
1997	76.637062
1998	77.326551
1999	78.369879
2000	78.522187
2001	79.47203
2002	80.008319
2003	79.710924
2004	80.256752
2005	81.076626
2006	81.848044
2007	82.593042
2008	83.424532
2009	83.215081
2010	82.804658
2011	82.571363
2012	82.283408
2013	81.690001
2014	82.824727
2015	82.495487
2016	82.150334
2017	81.979617
2018	81.647309
2019	79.74846
2020	78.864938
2021	74.393414
2022	73.154657