Year	% of cohort
1971	58.3668785095215
1972	59.2678298950195
1973	61.3328895568848
1974	62.2803192138672
1975	61.3050384521484
1976	62.8663711547852
1977	64.2074432373047
1978	62.8981094360352
1979	63.2422103881836
1980	62.8613014221191
1981	62.8925094604492
1982	64.6315536499023
1983	63.9370498657227
1984	63.8591995239258
1985	64.726692199707
1986	65.1404800415039
1987	65.1172714233398
1988	64.4078979492188
1989	63.7906799316406
1990	64.0240936279297
1991	63.081859588623
1992	64.3435821533203
1993	63.1843299865723
1994	62.1468696594238
1995	62.573371887207
1996	60.9503784179688
1997	61.685920715332
1998	62.035888671875
1999	62.9523506164551
2000	63.511531829834
2001	64.3127822875977
2002	62.9506301879883
2003	61.1509895324707
2004	59.9822616577148
2005	61.3566818237305
2006	56.3978385925293
2007	57.2589912414551
2008	62.2394714355469
2009	57.9367904663086
2010	56.493968963623
2011	59.462818145752
2012	57.8348007202148
2013	58.5454902648926
2014	59.0077285766602
2015	59.8774108886719
2016	59.2852592468262
2017	60.1175994873047
2018	61.2295989990234
2019	61.7238616943359
2020	62.0020599365234