Frequencies for first 10,000 rows of dmage variable in linkco1991us_num dataset : Age of | Mother | Freq. Percent Cum. ------------+----------------------------------- 12 | 1 0.01 0.01 13 | 20 0.20 0.21 14 | 50 0.50 0.71 15 | 138 1.38 2.09 16 | 249 2.49 4.58 17 | 346 3.46 8.04 18 | 484 4.84 12.88 19 | 562 5.62 18.50 20 | 610 6.10 24.60 21 | 631 6.31 30.91 22 | 561 5.61 36.52 23 | 530 5.30 41.82 24 | 547 5.47 47.29 25 | 471 4.71 52.00 26 | 496 4.96 56.96 27 | 510 5.10 62.06 28 | 502 5.02 67.08 29 | 469 4.69 71.77 30 | 452 4.52 76.29 31 | 419 4.19 80.48 32 | 389 3.89 84.37 33 | 308 3.08 87.45 34 | 290 2.90 90.35 35 | 237 2.37 92.72 36 | 214 2.14 94.86 37 | 164 1.64 96.50 38 | 122 1.22 97.72 39 | 91 0.91 98.63 40 | 52 0.52 99.15 41 | 37 0.37 99.52 42 | 16 0.16 99.68 43 | 21 0.21 99.89 44 | 5 0.05 99.94 45 | 2 0.02 99.96 46 | 2 0.02 99.98 47 | 1 0.01 99.99 49 | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Dec 2015