Year	% of cohort
1960	59.430008
1961	61.706012
1962	61.404012
1963	59.299333
1964	63.428841
1965	64.952202
1966	67.625754
1967	68.00817
1968	69.011326
1969	69.412733
1970	70.432774
1971	71.818336
1972	73.045401
1973	73.522451
1974	74.443072
1975	74.904018
1976	76.135294
1977	77.355247
1978	78.402801
1979	78.991474
1980	78.679727
1981	79.47258
1982	79.455258
1983	79.029148
1984	79.941067
1985	80.194646
1986	80.232979
1987	80.281291
1988	80.95592
1989	81.631241
1990	82.271679
1991	82.970931
1992	82.304753
1993	83.307849
1994	82.92065
1995	82.781958
1996	83.802396
1997	83.714268
1998	83.934409
1999	84.687039
2000	84.517566
2001	85.69316
2002	85.31051
2003	85.44426
2004	85.846594
2005	85.837166
2006	86.2538
2007	86.018865
2008	86.8122
2009	87.24044
2010	87.709686
2011	87.735674
2012	87.641651
2013	88.717712
2014	88.861654
2015	88.870746
2016	88.970799
2017	89.36021
2018	90.500001
2019	90.490635
2020	88.658028
2021	86.529696
2022	86.536871