Year	% of cohort
1972	15.5871295928955
1973	50.4749908447266
1974	67.1288986206055
1975	58.8743095397949
1976	56.8578109741211
1977	80.589111328125
1978	61.1940116882324
1979	76.4647064208984
1980	81.2810516357422
1982	85.3992462158203
1983	84.6364974975586
1984	83.3587265014648
1986	86.2989501953125
1987	84.0232086181641
1988	68.3395614624023
1989	69.8123397827148
1990	76.1068572998047
1991	61.8216094970703
1992	73.4262084960938
2000	58.8123817443848
2001	64.7607879638672
2002	68.3241424560547
2003	64.2331237792969
2004	68.5536422729492
2006	68.9918975830078
2007	64.6818618774414
2008	72.5826110839844
2009	62.3465690612793
2010	58.9939308166504
2011	53.5934600830078
2012	59.3095588684082
2013	64.3993606567383
2014	58.7014503479004
2015	56.3357582092285
2016	53.809871673584
2017	54.4382209777832
2018	53.278190612793
2019	59.8968811035156