Year	% of cohort
1960	32.806098
1961	35.847934
1962	36.550148
1963	37.316349
1964	38.144086
1965	39.003587
1966	39.859176
1967	40.780037
1968	41.648481
1969	42.447585
1970	43.173209
1971	43.83264
1972	44.468598
1973	45.083806
1974	45.786097
1975	46.581667
1976	47.556599
1977	48.694203
1978	49.930054
1979	51.274913
1980	52.722975
1981	54.062081
1982	55.457012
1983	56.785161
1984	58.040464
1985	59.381526
1986	60.640237
1987	61.753518
1988	62.804656
1989	63.765009
1990	64.658521
1991	65.472576
1992	66.210579
1993	67.058083
1994	67.860987
1995	68.537318
1996	69.328114
1997	69.982852
1998	70.673418
1999	71.415583
2000	72.092867
2001	72.724332
2002	73.299975
2003	73.901954
2004	74.367689
2005	75.291821
2006	76.124848
2007	76.934845
2008	77.664019
2009	78.337483
2010	78.937566
2011	79.852126
2012	80.694194
2013	81.443831
2014	82.122166
2015	82.750772
2016	83.380255
2017	84.12035
2018	84.744479
2019	85.271585
2020	85.027408
2021	85.084479
2022	86.228285