Year	% of cohort
1960	79.325106
1961	79.308721
1962	78.741641
1963	80.059688
1964	80.939057
1965	80.406106
1966	80.371136
1967	81.098241
1968	81.056992
1969	80.478925
1970	80.742883
1971	81.401686
1972	81.119972
1973	81.239552
1974	81.874793
1975	81.061006
1976	80.550778
1977	81.032434
1978	80.696095
1979	80.523334
1980	80.75932
1981	80.891084
1982	81.413686
1983	81.442355
1984	80.714287
1985	80.69406
1986	81.83879
1987	81.683279
1988	81.686137
1989	82.271336
1990	82.082805
1991	82.088816
1992	82.198446
1993	81.513538
1994	81.162004
1995	82.309213
1996	83.501043
1997	84.062335
1998	83.580815
1999	84.724345
2000	84.818856
2001	85.246766
2002	85.492288
2003	85.600781
2004	86.161959
2005	86.605423
2006	86.9719
2007	87.157347
2008	87.582472
2009	88.085263
2010	88.492057
2011	89.140219
2012	89.279165
2013	89.428982
2014	89.641765
2015	89.937787
2016	90.266853
2017	90.362351
2018	90.569628
2019	91.078648
2020	90.368139
2021	90.453032
2022	91.345086