Year	% of cohort
1970	71.1834564208984
1971	72.0803833007812
1972	75.7027282714844
1973	68.4277801513672
1974	65.3794403076172
1975	77.0664520263672
1976	71.38427734375
1977	73.5802917480469
1978	75.5545883178711
1979	70.2310333251953
1980	74.7195434570312
1981	70.3992004394531
1982	77.0811614990234
1983	78.7766723632812
1984	75.8335189819336
1985	80.6435928344727
1986	75.9701690673828
1987	78.7816467285156
1988	77.4664306640625
1989	78.8532409667969
1990	77.1749420166016
1991	79.3694305419922
1992	80.8089828491211
1993	83.1674575805664
1994	84.0756072998047
1995	83.0497665405273
1999	88.5970687866211
2000	90.4847412109375
2001	88.4223785400391
2004	83.5972671508789
2005	90.4608383178711
2006	83.835090637207
2007	93.8493728637695
2008	94.2140579223633
2009	88.7986297607422
2010	91.0440063476562
2011	88.4569931030273
2012	87.7201766967773
2013	90.367301940918
2014	93.8645629882812
2015	94.4147720336914
2016	93.3388366699219
2020	97.3942337036133