Year	% of cohort
1960	40.196547
1961	40.776205
1962	41.232591
1963	33.319286
1964	41.34321
1965	41.598982
1966	41.470547
1967	41.523128
1968	41.053019
1969	40.755326
1970	40.568964
1971	40.153129
1972	39.843882
1973	39.329559
1974	38.655124
1975	37.963998
1976	37.740038
1977	37.725258
1978	38.303794
1979	39.23847
1980	40.378477
1981	41.728081
1982	42.885687
1983	42.741984
1984	42.299866
1985	41.421452
1986	40.369982
1987	38.99913
1988	38.026091
1989	36.552023
1990	32.294045
1991	28.7483
1992	25.026669
1993	21.701896
1994	0.000668
1995	21.420475
1996	23.521852
1997	23.024716
1998	24.304092
1999	30.38533
2000	34.294108
2001	36.925704
2002	40.18345
2003	44.13915
2004	47.098365
2005	49.416227
2006	50.806971
2007	52.382591
2008	53.567238
2009	54.547067
2010	54.917587
2011	55.242456
2012	56.269746
2013	57.393714
2014	57.485382
2015	58.329835
2016	58.382546
2017	58.780855
2018	59.838837
2019	60.080768
2020	60.363683
2021	58.966639
2022	61.199241