Year	% of cohort
1960	63.51469860128971
1961	64.1241053818924
1962	63.98140592407432
1963	64.11482414386755
1964	64.78182899733284
1965	64.94805119299431
1966	65.30254445513565
1967	65.73138070724305
1968	65.58576189941401
1969	65.4888669191188
1970	66.04593312921354
1971	66.53829269517341
1972	66.88403129508846
1973	67.26751516640705
1974	67.90521335009397
1975	68.2226437609454
1976	68.5751566522299
1977	69.07048582759214
1978	69.29478797947104
1979	69.85561036342763
1980	69.95376695991816
1981	70.7190231665852
1982	71.27065400533792
1983	71.39357885271608
1984	71.86069375390665
1985	72.06258000836488
1986	72.5564018372994
1987	72.97584378653005
1988	73.26308930199153
1989	73.55150312937339
1990	73.86839584673895
1991	74.12459629512526
1992	74.54200712718855
1993	74.82668924722614
1994	75.26577058892276
1995	75.55646529097201
1996	76.26295177934152
1997	77.04369335350522
1998	77.48952767869415
1999	77.81736965570593
2000	78.4175240816845
2001	78.82665124976448
2002	79.15360564572183
2003	79.3776210266374
2004	79.91608258818913
2005	80.08374007586208
2006	80.42391480436265
2007	80.67426885393778
2008	80.9636731037289
2009	81.29171284349205
2010	81.65268882179929
2011	81.85807097396662
2012	82.19682247695366
2013	82.46499371837713
2014	82.71879211138021
2015	82.643978807605
2016	82.66920775014952
2017	82.78993312004472
2018	82.86524673951907
2019	83.1005718510646
2020	80.8137936338172
2021	80.12026101389824
2022	82.47564061032101