Year	% of cohort
1960	41.21103159453573
1961	46.90783579563802
1962	55.325509104881526
1963	56.07524050376757
1964	57.0708048523005
1965	57.900487060034436
1966	58.62825694397229
1967	59.23988510291558
1968	59.821640089717654
1969	60.47042268513165
1970	61.421104565381405
1971	62.413697441797396
1972	63.25141536508831
1973	64.529364899173
1974	65.58914418387873
1975	66.69740903225362
1976	67.6251731436921
1977	68.6262130350656
1978	69.48579386289961
1979	70.25728284319119
1980	70.98779321606796
1981	71.8300831183862
1982	72.55233749786859
1983	73.22886869336011
1984	73.78219146264546
1985	74.30856386131367
1986	75.21296069480523
1987	75.79556276043652
1988	76.22099719036044
1989	76.77611344873087
1990	77.01817330648842
1991	77.0891531714974
1992	77.79854951637873
1993	78.35836021116461
1994	78.54690761092805
1995	79.03243514245673
1996	79.43867973191321
1997	79.98520220202761
1998	80.73318651223184
1999	80.75249906832805
2000	81.40056677189737
2001	82.43837770826246
2002	82.82619878804361
2003	83.40382046081484
2004	83.80336547260627
2005	84.38578222551702
2006	84.87726015602993
2007	85.29153767813916
2008	85.41109400800474
2009	85.96872713645982
2010	86.31091402876612
2011	86.73101288335224
2012	87.10151604027102
2013	87.43718776669202
2014	87.80631228250546
2015	88.06251600892486
2016	88.38338699803855
2017	88.65279896810753
2018	88.92264409323246
2019	89.1356559915502
2020	88.58672483801938
2021	88.03025459560979
2022	88.54856141109428