Year	% of cohort
1960	60.912076
1961	62.413235
1962	63.755905
1963	64.859606
1964	65.664268
1965	66.13916
1966	66.298295
1967	66.431855
1968	66.573848
1969	66.95462
1970	67.652617
1971	68.916197
1972	70.230063
1973	71.483815
1974	72.568716
1975	73.328005
1976	73.804858
1977	74.135154
1978	74.416459
1979	74.895398
1980	75.59573
1981	76.539118
1982	77.582585
1983	78.592881
1984	79.451766
1985	80.064547
1986	80.418025
1987	80.606531
1988	80.624237
1989	80.094682
1990	80.994754
1991	81.157548
1992	81.559296
1993	82.086631
1994	82.485142
1995	82.819227
1996	83.101213
1997	83.345932
1998	83.576825
1999	83.839961
2000	84.142965
2001	84.491293
2002	84.846055
2003	85.200744
2004	85.505286
2005	85.80036
2006	86.013659
2007	86.196762
2008	86.287385
2009	86.407006
2010	86.448791
2011	86.520062
2012	86.580831
2013	86.690704
2014	86.840772
2015	87.088354
2016	87.346901
2017	87.514074
2018	87.451501
2019	86.981138
2020	86.273978
2021	85.866801
2022	86.460689