Year	% of cohort
1976	85.8980178833008
1977	85.4916763305664
1978	76.0481033325195
1979	78.999153137207
1981	80.4527587890625
1982	81.8365173339844
1983	80.4022903442383
1984	80.1863327026367
1985	80.798469543457
1988	78.4574279785156
1989	80.5279998779297
1990	78.6586990356445
1992	78.1999435424805
1993	83.4697113037109
1994	85.5501708984375
1995	86.3565979003906
1996	83.9779663085938
1998	85.2144012451172
1999	86.1200637817383
2000	87.2275009155273
2001	91.4505920410156
2002	92.2021789550781
2003	92.7863693237305
2004	92.6579132080078
2006	94.1657333374023
2007	93.6695785522461
2008	93.9320526123047
2009	94.5701599121094
2012	95.2891387939453
2013	92.813606262207
2014	92.7261962890625
2016	93.2761917114258
2020	96.6736221313477