"Year","Early career: age 25 to 36","Mid career: age 37 to 48","Late career: age 49 to 60"
1902,,,0.2134034
1903,,,0.2032079
1904,,,0.2255175
1905,,,0.1697522
1906,,,0.1313201
1907,,,0.1458714
1908,,,0.1775773
1909,,,0.2236796
1910,,,0.2544254
1911,,,0.2871938
1912,,,0.2840199
1913,,,0.2729045
1914,,0.1526221,0.2830209
1915,,0.2458859,0.2804156
1916,,0.2765046,0.2756493
1917,,0.2108756,0.2677805
1918,,0.1326706,0.2763086
1919,,0.1098194,0.3056732
1920,,0.1517002,0.3100955
1921,,0.1775189,0.3177432
1922,,0.1757216,0.3357521
1923,,0.1889535,0.3539165
1924,,0.1980564,0.3853034
1925,,0.1975881,0.3839582
1926,0.3062948,0.195242,0.3613879
1927,0.290977,0.1885914,0.3680641
1928,0.2584973,0.2178643,0.3879889
1929,0.2081647,0.2573142,0.3938355
1930,0.1682917,0.2648275,0.4064372
1931,0.1803609,0.2664464,0.4423316
1932,0.1874348,0.2807857,0.4709637
1933,0.1746190,0.3072514,0.4607869
1934,0.1745038,0.3317723,0.4621789
1935,0.188362,0.3636239,0.5190758
1936,0.1935846,0.3908956,0.5293689
1937,0.1920331,0.3920415,0.4672418
1938,0.2249519,0.3920123,0.4604419
1939,0.2573235,0.3890067,0.492332
1940,0.2838087,0.4210087,0.5041161
1941,0.322344,0.4752822,0.5158435
1942,0.3431485,0.4722673,0.516723
1943,0.3783709,0.4687015,0.544347
1944,0.4236938,0.4890963,0.5797648
1945,0.4490847,0.5076924,0.6014061
1946,0.4849098,0.5298479,0.6352966
1947,0.5262272,0.540148,0.6437656
1948,0.5465829,0.547906,0.6367848
1949,0.5766977,0.5598714,0.6306362
1950,0.5875503,0.5529139,0.6129301
1951,0.5503799,0.5399887,
1952,0.5277768,0.5264309,
1953,0.5124895,0.4915074,
1954,0.4814548,0.4580619,
1955,0.4592408,0.4420305,
1956,0.4473067,0.4450571,
1957,0.4397597,0.4577116,
1958,0.4353216,0.4500838,
1959,0.4181038,0.4266115,
1960,0.4089145,0.4309047,
1961,0.4289481,0.4552324,
1962,0.4406358,0.464876,
1963,0.4378218,,
1964,0.4535699,,
1965,0.4766221,,
1966,0.472881,,
1967,0.453907,,
1968,0.4503935,,
1969,0.4521544,,
1970,0.4556721,,
1971,0.4712245,,
1972,0.4733657,,
1973,0.4680119,,
1974,0.4774906,,