Year	% of cohort
1960	35.634505
1961	36.382694
1962	35.625166
1963	37.990132
1964	38.708378
1965	39.417624
1966	40.696768
1967	41.418973
1968	41.63198
1969	43.674621
1970	44.970003
1971	46.405255
1972	46.905281
1973	49.494888
1974	51.004474
1975	52.377947
1976	53.908295
1977	55.456325
1978	53.859258
1979	59.004646
1980	60.230969
1981	61.059174
1982	62.828617
1983	64.6958
1984	66.277662
1985	67.599077
1986	68.621576
1987	69.030677
1988	70.188759
1989	71.618331
1990	68.95487
1991	72.983929
1992	73.827985
1993	74.215974
1994	75.095962
1995	75.395099
1996	76.568285
1997	76.885702
1998	77.771089
1999	78.473158
2000	79.160867
2001	79.834711
2002	80.516114
2003	78.90167
2004	81.855293
2005	83.637845
2006	83.975457
2007	84.091419
2008	83.576284
2009	83.140977
2010	84.217617
2011	85.215437
2012	85.827793
2013	86.007655
2014	86.792802
2015	87.359422
2016	87.89221
2017	88.967939
2018	88.849825
2019	88.517992
2020	85.10215
2021	86.039875
2022	86.939367