Year	% of cohort
1970	27.4309005737305
1971	32.5996589660645
1972	48.7755813598633
1973	37.5842399597168
1975	37.0155601501465
1976	37.2442283630371
1980	12.4893503189087
1981	61.5583610534668
1982	40.6462516784668
1983	40.2992210388184
1987	43.571159362793
1988	37.1987800598145
1991	49.7690086364746
1992	52.7379302978516
1995	66.9530868530273
2000	61.1473388671875
2001	63.2959213256836
2002	69.9536666870117
2005	65.177116394043
2006	66.9551315307617
2007	73.8527297973633
2008	74.236572265625
2009	86.0171508789062
2010	82.1107025146484
2011	82.3471603393555
2012	81.4751968383789
2013	80.2735366821289
2014	76.4322280883789
2015	76.8048324584961
2016	72.1449966430664
2017	81.4761276245117
2019	80.099250793457
2020	82.0535736083984