Frequencies for first 10,000 rows of dtotord variable in natl1983 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,757       37.57       37.57
          2 |      3,030       30.30       67.87
          3 |      1,718       17.18       85.05
          4 |        800        8.00       93.05
          5 |        358        3.58       96.63
          6 |        154        1.54       98.17
          7 |         84        0.84       99.01
          8 |         46        0.46       99.47
          9 |         21        0.21       99.68
         10 |          9        0.09       99.77
         11 |          9        0.09       99.86
         12 |          4        0.04       99.90
         13 |          3        0.03       99.93
         14 |          2        0.02       99.95
         15 |          2        0.02       99.97
         19 |          1        0.01       99.98
         99 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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