Year	% of cohort
1960	21.537049875533928
1961	27.515029302080215
1962	36.9349702696925
1963	37.73178757579336
1964	38.92697699090381
1965	38.29635136901837
1966	40.75883480276437
1967	42.360998596563206
1968	43.2710825016314
1969	44.57525389233214
1970	45.842505190146774
1971	47.52755003447952
1972	48.5881181057142
1973	50.27807248289029
1974	51.213445137861676
1975	52.71503838925292
1976	54.145786699776146
1977	55.29119204044072
1978	56.30208621463486
1979	57.394455785362176
1980	58.3657682187829
1981	59.3100827497166
1982	60.21173646126508
1983	60.96285521174042
1984	61.785270913858874
1985	62.53423752271857
1986	63.14331806487324
1987	63.8078421971582
1988	64.30094614992053
1989	64.90253323431688
1990	65.35591920579273
1991	66.05503360149865
1992	66.89932008826152
1993	67.50254846520046
1994	68.11325029140644
1995	68.70296833478224
1996	69.1377066212319
1997	69.7725505816793
1998	70.28474122010209
1999	70.78887087206307
2000	71.27041760924254
2001	71.82624705393675
2002	72.40783771338376
2003	72.82397827272949
2004	73.00687822366577
2005	73.75667341192413
2006	74.28894555854178
2007	74.60663203361496
2008	74.56074272341142
2009	75.22095243087584
2010	75.54268842608695
2011	75.87910529655359
2012	76.13546711439665
2013	76.43052812922105
2014	76.84481047741775
2015	77.11009833751042
2016	77.30447046602383
2017	77.16270247054679
2018	77.93422220773542
2019	78.26194432250776
2020	77.96274073268461
2021	77.21006733765608
2022	78.27699118634656