Year	% of cohort
1960	34.80590926720493
1961	35.60857765025912
1962	35.68872702230574
1963	37.624886643047525
1964	38.5280004894776
1965	39.25548520033094
1966	39.66134408249235
1967	40.02736473033536
1968	40.48568703998484
1969	41.09882427504013
1970	41.73251777479197
1971	42.63241247938503
1972	43.33364114395041
1973	43.578533346070024
1974	44.772990455577855
1975	45.24848140283658
1976	45.99719295503082
1977	47.85253247796001
1978	48.45300067459484
1979	50.16633640779077
1980	49.64928588597084
1981	47.70850863663435
1982	48.01470458541937
1983	50.63263477146431
1984	53.526879241910294
1985	54.69523261470529
1986	55.33079607415378
1987	56.82719634945794
1988	57.419334504977165
1989	60.08124639060329
1990	59.938906773085186
1991	62.31464360938301
1992	63.37701322116539
1993	63.95961247662537
1994	63.926910686251354
1995	64.45190642316392
1996	65.27039641460789
1997	65.73836630456823
1998	66.23581128197485
1999	66.96760278930375
2000	67.47021633044048
2001	68.07603840271582
2002	68.76147712762946
2003	68.16106978583127
2004	68.9703542591315
2005	69.47924257839438
2006	69.44523170913719
2007	70.01862461130767
2008	70.60224359239244
2009	71.33934440804236
2010	71.493999180973
2011	71.83201595981558
2012	71.50149242164537
2013	71.42117518053426
2014	72.1699759182905
2015	72.71962202167589
2016	72.94009207829627
2017	73.76744594647049
2018	74.36816358763585
2019	74.69023765834375
2020	72.24700165628198
2021	72.06889603679842
2022	72.73613154640542