Frequencies for first 10,000 rows of dfage variable in linkco1991us_num dataset : Age of | Father | Freq. Percent Cum. ------------+----------------------------------- 14 | 4 0.04 0.04 15 | 10 0.10 0.14 16 | 35 0.35 0.49 17 | 72 0.72 1.21 18 | 143 1.43 2.64 19 | 188 1.88 4.52 20 | 252 2.52 7.04 21 | 310 3.10 10.14 22 | 320 3.20 13.34 23 | 347 3.47 16.81 24 | 376 3.76 20.57 25 | 394 3.94 24.51 26 | 391 3.91 28.42 27 | 440 4.40 32.82 28 | 384 3.84 36.66 29 | 401 4.01 40.67 30 | 361 3.61 44.28 31 | 349 3.49 47.77 32 | 336 3.36 51.13 33 | 311 3.11 54.24 34 | 291 2.91 57.15 35 | 234 2.34 59.49 36 | 195 1.95 61.44 37 | 192 1.92 63.36 38 | 169 1.69 65.05 39 | 123 1.23 66.28 40 | 127 1.27 67.55 41 | 78 0.78 68.33 42 | 66 0.66 68.99 43 | 63 0.63 69.62 44 | 52 0.52 70.14 45 | 32 0.32 70.46 46 | 34 0.34 70.80 47 | 21 0.21 71.01 48 | 22 0.22 71.23 49 | 13 0.13 71.36 50 | 20 0.20 71.56 51 | 16 0.16 71.72 52 | 4 0.04 71.76 53 | 5 0.05 71.81 54 | 5 0.05 71.86 55 | 3 0.03 71.89 56 | 3 0.03 71.92 58 | 1 0.01 71.93 60 | 1 0.01 71.94 61 | 1 0.01 71.95 62 | 2 0.02 71.97 64 | 1 0.01 71.98 65 | 1 0.01 71.99 69 | 1 0.01 72.00 71 | 1 0.01 72.01 99 | 2,799 27.99 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015