Year	% of cohort
1960	47.493613
1961	48.175357
1962	48.805052
1963	49.450958
1964	50.072212
1965	50.700525
1966	51.315852
1967	51.930387
1968	52.52131
1969	53.134614
1970	53.77194
1971	54.436268
1972	55.143213
1973	55.899828
1974	56.699505
1975	57.531816
1976	58.362515
1977	59.258161
1978	60.050088
1979	60.684077
1980	61.320542
1981	62.067407
1982	62.744489
1983	63.404597
1984	64.231462
1985	64.737279
1986	64.852558
1987	64.456295
1988	62.836348
1989	61.917007
1990	59.886001
1991	57.449651
1992	54.791134
1993	52.099416
1994	49.544754
1995	46.941865
1996	44.590499
1997	42.177655
1998	39.931869
1999	37.903486
2000	36.297452
2001	35.340064
2002	34.992939
2003	35.262197
2004	36.284995
2005	37.998433
2006	39.734237
2007	43.248783
2008	46.438323
2009	49.912864
2010	53.865123
2011	56.260791
2012	56.401355
2013	60.47435
2014	62.344914
2015	64.499718
2016	68.869987
2017	72.079062
2018	66.825838
2019	67.976038
2020	68.300882
2021	58.194801
2022	68.821925