Frequencies for first 10,000 rows of dtotord variable in natl1973 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,292       42.92       42.92
          2 |      2,706       27.06       69.98
          3 |      1,354       13.54       83.52
          4 |        653        6.53       90.05
          5 |        356        3.56       93.61
          6 |        214        2.14       95.75
          7 |        108        1.08       96.83
          8 |         93        0.93       97.76
          9 |         69        0.69       98.45
         10 |         36        0.36       98.81
         11 |         15        0.15       98.96
         12 |         15        0.15       99.11
         13 |         12        0.12       99.23
         14 |          8        0.08       99.31
         15 |          3        0.03       99.34
         16 |          5        0.05       99.39
         17 |          2        0.02       99.41
         18 |          2        0.02       99.43
         99 |         57        0.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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