Year	% of cohort
1970	35.6431617736816
1971	37.6706314086914
1972	51.8464584350586
1973	42.1900291442871
1974	42.858211517334
1975	43.5337600708008
1976	41.9072608947754
1980	16.9322490692139
1981	65.4173965454102
1982	47.1811714172363
1983	49.4880790710449
1987	50.8339691162109
1988	44.4667701721191
1991	58.021671295166
1992	58.3213882446289
1995	76.6529998779297
2000	67.0335006713867
2001	68.8801498413086
2002	74.4727172851562
2005	72.0872192382812
2006	73.6630706787109
2007	79.7853622436523
2008	80.2475967407227
2009	89.3638000488281
2010	87.3174514770508
2011	87.0142211914062
2012	87.3637924194336
2013	85.9973068237305
2014	82.5175170898438
2015	82.5127029418945
2016	78.8279037475586
2017	86.5487823486328
2019	85.1827011108398
2020	87.1645736694336