Year	% of cohort
1960	35.110853
1961	35.981067
1962	36.609492
1963	37.259462
1964	38.230105
1965	38.884397
1966	39.689446
1967	40.372773
1968	41.199587
1969	41.862556
1970	42.072063
1971	42.439777
1972	42.726054
1973	43.012305
1974	43.519583
1975	44.239108
1976	44.711344
1977	45.400073
1978	46.063231
1979	46.93416
1980	47.701283
1981	48.56533
1982	49.40527
1983	49.898381
1984	50.601541
1985	51.097908
1986	51.787771
1987	52.756619
1988	53.666441
1989	53.540393
1990	54.646983
1991	54.986072
1992	55.717896
1993	56.074605
1994	55.67533
1995	55.338581
1996	54.823784
1997	55.536556
1998	55.611304
1999	56.363351
2000	56.949311
2001	57.320168
2002	57.384037
2003	57.339732
2004	57.735928
2005	57.648172
2006	58.112125
2007	58.595382
2008	58.706861
2009	59.487791
2010	60.176171
2011	60.36724
2012	60.861129
2013	61.172578
2014	61.807078
2015	61.98917
2016	62.592236
2017	62.768993
2018	63.320031
2019	63.515295
2020	60.823101
2021	60.379627
2022	60.878616