Year	% of cohort
1960	22.538169
1961	23.115043
1962	23.763802
1963	24.47282
1964	25.226077
1965	26.018421
1966	26.874396
1967	27.791018
1968	28.716169
1969	29.851773
1970	30.903029
1971	31.931657
1972	32.953083
1973	34.164025
1974	35.282206
1975	36.426797
1976	37.654857
1977	38.931184
1978	40.094752
1979	41.306879
1980	42.504855
1981	43.687163
1982	44.850571
1983	45.942468
1984	47.004164
1985	48.043735
1986	49.263163
1987	50.487865
1988	51.753028
1989	52.954754
1990	54.102749
1991	55.155504
1992	56.397499
1993	57.505258
1994	58.327226
1995	59.780767
1996	60.918921
1997	62.000176
1998	63.16919
1999	64.268454
2000	64.167596
2001	66.287021
2002	67.39735
2003	68.433698
2004	69.396646
2005	70.306307
2006	71.369267
2007	72.339375
2008	73.22858
2009	73.837219
2010	74.759026
2011	75.692186
2012	76.499583
2013	77.127733
2014	77.734397
2015	78.213458
2016	78.642343
2017	79.092037
2018	79.667994
2019	80.210823
2020	80.713338
2021	81.115272
2022	81.627458