Year	% of cohort
1960	23.63545
1961	24.149694
1962	24.469076
1963	24.851568
1964	25.389692
1965	25.784729
1966	26.151642
1967	26.18895
1968	26.455048
1969	27.004227
1970	27.308744
1971	27.760165
1972	28.140978
1973	28.603573
1974	27.478904
1975	26.362519
1976	26.743026
1977	27.276112
1978	28.029425
1979	28.610705
1980	30.309842
1981	30.928303
1982	29.979149
1983	30.861229
1984	31.525464
1985	31.890257
1986	34.182391
1987	33.838171
1988	34.939081
1989	34.162172
1990	38.22328
1991	39.269798
1992	43.780755
1993	44.895519
1994	45.946034
1995	47.148615
1996	48.102835
1997	48.543098
1998	25.173765
1999	14.755728
2000	45.720937
2001	50.602636
2002	51.468381
2003	52.20298
2004	53.161298
2005	54.080217
2006	56.099407
2007	56.906635
2008	57.763042
2009	58.825527
2010	59.565319
2011	60.331403
2012	61.269885
2013	61.584529
2014	62.219984
2015	63.032301
2016	63.30588
2017	63.878828
2018	64.558425
2019	64.999723
2020	64.109886
2021	62.679972
2022	62.862083