Year	% of cohort
1960	15.889074
1961	23.334438
1962	35.506056
1963	36.537757
1964	37.839351
1965	39.049361
1966	40.505099
1967	41.89706
1968	43.336639
1969	44.665434
1970	46.288362
1971	48.250215
1972	49.75538
1973	51.490266
1974	52.626522
1975	53.843217
1976	55.334523
1977	56.599311
1978	57.734263
1979	58.867093
1980	59.833361
1981	60.831446
1982	61.755837
1983	62.572635
1984	63.395743
1985	64.077565
1986	64.741088
1987	65.327054
1988	65.954693
1989	66.524251
1990	66.984006
1991	67.726589
1992	68.66666
1993	69.363984
1994	70.052948
1995	70.759671
1996	71.264278
1997	71.92607
1998	72.484732
1999	73.229231
2000	73.736102
2001	74.417991
2002	74.974744
2003	75.523298
2004	76.062423
2005	76.565825
2006	77.209014
2007	77.47703
2008	77.612422
2009	78.29073
2010	78.618391
2011	79.009244
2012	79.332248
2013	79.719766
2014	80.123067
2015	80.444375
2016	80.717571
2017	80.444696
2018	81.393775
2019	81.781895
2020	81.903129
2021	82.272771
2022	82.805894