Frequencies for first 10,000 rows of dtotord variable in natl1972 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,152       41.52       41.52
          2 |      2,693       26.93       68.45
          3 |      1,403       14.03       82.48
          4 |        728        7.28       89.76
          5 |        370        3.70       93.46
          6 |        204        2.04       95.50
          7 |        125        1.25       96.75
          8 |         89        0.89       97.64
          9 |         54        0.54       98.18
         10 |         49        0.49       98.67
         11 |         37        0.37       99.04
         12 |         18        0.18       99.22
         13 |         19        0.19       99.41
         14 |          5        0.05       99.46
         15 |          1        0.01       99.47
         16 |          2        0.02       99.49
         17 |          1        0.01       99.50
         99 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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