Year	% of cohort
1960	37.749864
1961	38.481099
1962	39.379103
1963	40.153254
1964	41.61196
1965	43.222221
1966	44.291689
1967	45.816488
1968	47.345836
1969	47.513457
1970	48.098612
1971	48.947975
1972	49.022195
1973	49.974541
1974	50.474901
1975	50.506226
1976	51.489334
1977	52.062768
1978	52.100936
1979	53.00916
1980	53.735193
1981	53.79587
1982	54.633544
1983	54.826408
1984	55.476091
1985	55.390601
1986	56.162997
1987	56.187758
1988	56.154282
1989	56.983687
1990	56.938042
1991	57.731583
1992	57.918432
1993	58.957679
1994	59.594031
1995	60.116295
1996	61.744651
1997	62.428702
1998	63.719441
1999	63.710735
2000	63.828124
2001	64.527641
2002	64.71357
2003	65.358313
2004	65.314638
2005	65.957023
2006	65.812717
2007	66.718475
2008	53.743866
2009	68.044681
2010	68.063797
2011	69.441888
2012	69.729918
2013	71.039364
2014	71.50852
2015	72.595989
2016	72.66229
2017	72.87146
2018	74.180631
2019	74.328195
2020	74.50012
2021	72.57704
2022	75.406303