Year	% of cohort
1960	64.023786
1961	65.347961
1962	66.723033
1963	68.075829
1964	69.795727
1965	71.247963
1966	72.625513
1967	74.017337
1968	75.209977
1969	76.576652
1970	77.38567
1971	78.449738
1972	78.901548
1973	79.286993
1974	80.042467
1975	80.418361
1976	80.802442
1977	81.141433
1978	81.761831
1979	82.044693
1980	82.220527
1981	82.456956
1982	82.724501
1983	82.725499
1984	82.830738
1985	82.951111
1986	82.990304
1987	83.064174
1988	83.006783
1989	82.760727
1990	82.911053
1991	82.81261
1992	82.875188
1993	82.726911
1994	83.032532
1995	83.197557
1996	83.644764
1997	83.917032
1998	84.1003
1999	84.417268
2000	84.908898
2001	85.502415
2002	85.827722
2003	85.305719
2004	85.226284
2005	85.686946
2006	85.638162
2007	86.102663
2008	86.439586
2009	86.652782
2010	86.766728
2011	87.04303
2012	87.309231
2013	87.609622
2014	87.984271
2015	87.921824
2016	88.290235
2017	88.462171
2018	88.9027
2019	89.224613
2020	89.525039
2021	89.700867
2022	89.522211