Year	% of cohort
1971	25.869010925293
1972	30.8030109405518
1973	29.4346103668213
1974	34.8055191040039
1976	46.2734107971191
1979	71.3019790649414
1980	78.3247604370117
1981	64.1595993041992
1982	48.3724098205566
1983	54.1691093444824
1984	56.3127517700195
1985	56.7306213378906
1986	61.8703384399414
1987	59.6177787780762
1988	59.0987281799316
1989	51.7239608764648
1990	50.3711318969727
1991	49.1742782592773
2000	30.9728107452393
2001	30.4130001068115
2002	37.3280296325684
2003	32.2961616516113
2008	40.1271705627441
2009	38.9702301025391
2011	37.5553512573242
2012	38.6631011962891
2013	38.9373588562012
2014	48.391429901123
2015	61.1711387634277
2016	63.0407981872559
2017	59.7520904541016
2018	71.3153533935547