Frequencies for first 10,000 rows of dgestat variable in natl1982 dataset : Gestation | Freq. Percent Cum. ------------+----------------------------------- 17 | 1 0.01 0.01 18 | 4 0.04 0.05 20 | 2 0.02 0.07 21 | 4 0.04 0.11 22 | 7 0.07 0.18 23 | 9 0.09 0.27 24 | 10 0.10 0.37 25 | 18 0.18 0.55 26 | 12 0.12 0.67 27 | 12 0.12 0.79 28 | 32 0.32 1.11 29 | 33 0.33 1.44 30 | 31 0.31 1.75 31 | 38 0.38 2.13 32 | 73 0.73 2.86 33 | 70 0.70 3.56 34 | 129 1.29 4.85 35 | 255 2.55 7.40 36 | 333 3.33 10.73 37 | 569 5.69 16.42 38 | 1,094 10.94 27.36 39 | 1,874 18.74 46.10 40 | 2,055 20.55 66.65 41 | 1,478 14.78 81.43 42 | 809 8.09 89.52 43 | 351 3.51 93.03 44 | 198 1.98 95.01 45 | 151 1.51 96.52 46 | 63 0.63 97.15 47 | 32 0.32 97.47 48 | 22 0.22 97.69 49 | 15 0.15 97.84 50 | 6 0.06 97.90 51 | 3 0.03 97.93 52 | 10 0.10 98.03 99 | 197 1.97 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 3 Jan 2016