Frequencies for first 10,000 rows of dtotord variable in natl1969 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,735       37.35       37.35
          2 |      2,606       26.06       63.41
          3 |      1,434       14.34       77.75
          4 |        834        8.34       86.09
          5 |        437        4.37       90.46
          6 |        266        2.66       93.12
          7 |        174        1.74       94.86
          8 |        138        1.38       96.24
          9 |         94        0.94       97.18
         10 |         64        0.64       97.82
         11 |         55        0.55       98.37
         12 |         38        0.38       98.75
         13 |         21        0.21       98.96
         14 |          5        0.05       99.01
         15 |          6        0.06       99.07
         16 |          5        0.05       99.12
         17 |          2        0.02       99.14
         21 |          1        0.01       99.15
         22 |          1        0.01       99.16
         24 |          1        0.01       99.17
         25 |          1        0.01       99.18
         51 |          1        0.01       99.19
         99 |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016