Year	% of cohort
1960	45.212282
1961	45.717498
1962	45.881886
1963	46.2025
1964	46.472277
1965	46.794707
1966	47.169318
1967	47.588887
1968	48.236742
1969	48.951868
1970	50.042547
1971	51.182037
1972	52.203359
1973	53.214171
1974	54.307352
1975	55.49
1976	56.36223
1977	57.659743
1978	58.620353
1979	59.573574
1980	59.974969
1981	60.684259
1982	60.868509
1983	61.103038
1984	61.399747
1985	62.068699
1986	63.251224
1987	64.528015
1988	65.887975
1989	66.597384
1990	67.961353
1991	68.324769
1992	68.551426
1993	68.749898
1994	68.852073
1995	67.233574
1996	70.407769
1997	71.935162
1998	72.653771
1999	73.788337
2000	76.513554
2001	78.494032
2002	79.987493
2003	81.333046
2004	82.688123
2005	83.331513
2006	83.262772
2007	84.685077
2008	83.650028
2009	85.395989
2010	85.895158
2011	86.741173
2012	86.209401
2013	87.75685
2014	88.07094
2015	87.488199
2016	88.621177
2017	89.339107
2018	88.598303
2019	88.970228
2020	87.959723
2021	87.154545
2022	87.803803