Year	% of cohort
1972	51.6360702514648
1973	59.015869140625
1974	45.5800018310547
1975	40.1150207519531
1976	35.9385795593262
1977	37.3901596069336
1978	40.6610717773438
1979	42.6788711547852
1980	49.8537292480469
1981	56.0135688781738
1982	48.905948638916
1983	48.8662986755371
1984	55.4533805847168
1985	49.4350204467773
1986	54.3800888061523
1987	55.5793113708496
1988	50.0393486022949
1989	55.3831405639648
1990	58.2708587646484
1991	58.8344993591309
1992	54.3888397216797
1993	71.6090774536133
1994	67.9392318725586
1995	55.3234596252441
1996	62.091911315918
1997	65.1115112304688
1998	61.3039894104004
1999	68.1938781738281
2000	60.4765090942383
2001	66.2332305908203
2002	69.457893371582
2003	58.1660690307617
2004	66.1804962158203
2005	68.9265213012695
2006	55.6453895568848
2007	72.8595275878906
2008	64.5467910766602
2009	76.2621765136719
2010	69.2671737670898
2011	69.6126327514648
2012	63.0989990234375
2013	74.2711410522461
2014	72.8121032714844
2015	78.5632629394531
2022	79.7043991088867