Year	% of cohort
1973	41.8794898986816
1974	42.5678901672363
1975	33.4203109741211
1976	32.6158981323242
1977	30.639030456543
1978	31.8562297821045
1979	39.1487693786621
1980	34.2634010314941
1981	39.7174415588379
1982	27.1405601501465
1983	31.8054103851318
1984	40.9191284179688
1985	42.3009414672852
1986	54.2151908874512
1987	41.3578109741211
1988	54.9029693603516
1989	49.6319999694824
1990	44.1567802429199
1991	57.3610992431641
1992	47.8586883544922
1993	35.8610687255859
1995	32.3461799621582
1999	42.1900787353516
2001	38.1060218811035
2004	40.7490615844727
2005	44.4259910583496
2006	42.6766204833984
2007	65.8787231445312
2008	50.0655708312988
2009	62.2743186950684
2010	60.196720123291
2011	56.8410682678223
2012	67.456916809082
2013	64.9900283813477
2018	73.4768295288086