Year	% of cohort
1972	3.41760993003845
1973	37.6673889160156
1974	55.2721290588379
1975	45.6134910583496
1976	45.7104797363281
1977	72.7938919067383
1978	47.5646018981934
1979	67.8236236572266
1980	75.1973724365234
1982	84.3076477050781
1987	82.5431365966797
1988	62.6578216552734
1989	67.7353897094727
1991	60.2327003479004
1992	71.6711502075195
2000	53.817741394043
2001	57.7912292480469
2002	64.6177520751953
2003	57.8551483154297
2004	62.7538414001465
2006	64.5382766723633
2007	59.5893516540527
2008	69.1104507446289
2009	56.1779403686523
2010	50.7216682434082
2011	43.802059173584
2012	49.038158416748
2013	52.5704307556152
2014	44.5647811889648
2015	44.3301582336426
2016	43.2267990112305
2017	43.7585792541504
2018	42.9858016967773
2019	49.7019691467285