Year	% of cohort
1960	48.795416
1961	50.65041
1962	52.933493
1963	54.762601
1964	56.9041
1965	59.077945
1966	60.813995
1967	62.207788
1968	63.221782
1969	64.01902
1970	64.509429
1971	64.778896
1972	64.640147
1973	64.644352
1974	65.577367
1975	66.189234
1976	66.520914
1977	67.004313
1978	67.138984
1979	67.940185
1980	68.898419
1981	69.287529
1982	69.359749
1983	70.490266
1984	70.8493
1985	71.440111
1986	71.31952
1987	71.935535
1988	71.236585
1989	71.502253
1990	70.584564
1991	71.322076
1992	71.370935
1993	71.675574
1994	70.908767
1995	71.371283
1996	69.853831
1997	69.552506
1998	69.437905
1999	69.001794
2000	68.980862
2001	69.676311
2002	69.64066
2003	70.310982
2004	71.705834
2005	72.151752
2006	72.711362
2007	73.851661
2008	73.921987
2009	74.202342
2010	73.57277
2011	73.458205
2012	72.397754
2013	71.996645
2014	72.76094
2015	72.62992
2016	72.317696
2017	72.357876
2018	72.026317
2019	69.605111
2020	68.335985
2021	63.170094
2022	61.648655