Year	% of cohort
1970	92.0846176147461
1971	92.0082092285156
1972	92.2797927856445
1979	93.5802688598633
1980	93.8567733764648
1981	94.3664016723633
1982	93.8963470458984
1983	94.417106628418
1984	94.9257507324219
1985	95.1174011230469
1986	94.3011627197266
1987	94.0676116943359
1988	94.450439453125
1989	94.6103286743164
1990	94.8567276000977
1991	95.0462112426758
1992	95.0489883422852
1993	95.3012771606445
1994	94.6675186157227
1995	95.7969512939453
1996	95.0381088256836
1997	94.5589294433594
1998	95.9377517700195
1999	95.7958374023438
2000	95.96826171875
2001	96.038932800293
2002	96.1983337402344
2003	96.5442504882812
2004	96.5916137695312
2005	96.2952423095703
2006	96.1327590942383
2007	95.9188537597656
2008	95.9763031005859
2009	96.0238800048828
2010	96.2337799072266
2011	96.1047134399414
2012	95.8225631713867
2013	96.0668106079102
2014	96.3310089111328
2015	96.5770111083984
2016	96.495231628418
2017	96.9092636108398
2018	97.0018768310547
2019	97.0391235351562
2020	97.0240707397461
2021	97.0427017211914