Year	% of cohort
1971	69.6705017089844
1978	75.2183380126953
1979	67.2210998535156
1980	63.4174690246582
1981	45.2272911071777
1982	46.018798828125
1983	29.4328308105469
1984	35.6230316162109
1985	40.0804901123047
1986	62.7789688110352
1987	51.1200790405273
1988	52.6703796386719
1989	60.4673194885254
1990	59.4810981750488
1991	44.9780807495117
1995	59.6599807739258
1999	49.5107688903809
2000	69.2638626098633
2002	64.7154083251953
2003	73.6021423339844
2004	70.7174224853516
2005	79.7063903808594
2007	71.3318862915039
2009	76.8320465087891
2010	58.1400604248047
2011	73.4888763427734
2012	70.2725524902344
2013	60.4555702209473
2020	74.0777130126953
2021	81.1056213378906