Year	% of cohort
1960	58.923699
1961	59.590259
1962	59.859588
1963	60.715803
1964	60.748505
1965	61.281285
1966	61.974783
1967	62.115727
1968	62.070745
1969	61.410376
1970	61.925415
1971	61.353573
1972	62.410953
1973	62.587109
1974	63.146552
1975	63.309599
1976	63.463339
1977	63.528991
1978	63.679224
1979	63.73429
1980	64.079627
1981	64.765971
1982	64.489534
1983	62.534201
1984	64.06822
1985	64.985149
1986	66.156159
1987	66.132823
1988	67.516095
1989	68.329685
1990	69.282667
1991	68.836971
1992	69.219295
1993	69.001188
1994	70.787942
1995	71.759184
1996	72.775016
1997	73.16844
1998	73.575039
1999	74.394725
2000	75.293466
2001	75.746502
2002	76.278285
2003	76.099369
2004	77.843801
2005	78.685737
2006	79.616266
2007	79.973977
2008	81.121209
2009	81.660374
2010	82.332021
2011	82.957921
2012	83.360186
2013	83.696281
2014	84.875683
2015	84.825634
2016	85.570105
2017	85.618889
2018	86.249455
2019	86.948799
2020	85.894358
2021	85.572083
2022	87.52857