Year	% of cohort
1970	34.765510559082
1971	39.2818603515625
1972	43.9251518249512
1973	39.8990211486816
1981	38.6333694458008
1982	57.3056297302246
1983	56.6100196838379
1984	62.8739318847656
1985	56.2858695983887
1986	58.2103614807129
1987	58.9748115539551
1988	58.9077606201172
1992	59.3568115234375
1993	62.4472198486328
1994	61.0496788024902
1998	72.1964797973633
1999	69.3014907836914
2004	83.6438522338867
2005	84.7549514770508
2006	89.2309494018555
2009	85.1106033325195
2010	87.1127395629883
2011	87.0392990112305
2012	71.2388229370117
2013	86.0768432617188
2014	90.9490585327148
2015	92.2972030639648
2016	93.9779815673828
2017	94.9148178100586
2018	97.4035491943359
2019	97.5060424804688
2020	97.6595230102539
2021	92.941520690918