Year	% of cohort
1960	67.573781
1961	70.261239
1962	71.245441
1963	71.648971
1964	72.028693
1965	71.95842
1966	55.657007
1967	72.068933
1968	72.307987
1969	73.040661
1970	73.470163
1971	74.333904
1972	74.94036
1973	74.919868
1974	75.599959
1975	76.16672
1976	76.392238
1977	76.915085
1978	77.567174
1979	78.110794
1980	78.687363
1981	79.16264
1982	79.582664
1983	79.818525
1984	80.1519
1985	80.560178
1986	80.727005
1987	81.381937
1988	81.247758
1989	80.811046
1990	80.666995
1991	80.621946
1992	80.77998
1993	80.898176
1994	80.928843
1995	81.180763
1996	81.270563
1997	81.366073
1998	81.443704
1999	80.671298
2000	80.59066
2001	80.936167
2002	81.431908
2003	81.227435
2004	82.038618
2005	82.356487
2006	81.441941
2007	81.484416
2008	81.506974
2009	78.034112
2010	81.520086
2011	81.560477
2012	81.970049
2013	81.940203
2014	81.951695
2015	82.337043
2016	82.55759
2017	82.904758
2018	82.951049
2019	82.835237
2020	82.900723
2021	85.086998
2022	83.484592