Year	% of cohort
1976	73.8925018310547
1977	77.1953582763672
1978	70.3152770996094
1979	69.3159790039062
1981	75.3766784667969
1982	75.0910873413086
1983	76.5058975219727
1984	75.9463272094727
1985	75.6311721801758
1988	73.7349014282227
1989	77.4102630615234
1990	77.1852035522461
1992	78.6616897583008
1993	84.4337615966797
1994	86.813232421875
1995	87.9116821289062
1996	86.628547668457
1998	87.9215927124023
1999	88.3210830688477
2000	89.5391998291016
2001	92.7923431396484
2002	94.1808776855469
2003	93.8205413818359
2004	94.4129867553711
2006	94.3979797363281
2007	94.6127014160156
2008	95.4805679321289
2009	95.140510559082
2012	93.0085296630859
2013	95.1757278442383
2014	93.7025527954102
2016	95.0499725341797
2020	97.9564666748047