Frequencies for first 10,000 rows of dtotord variable in natl1986 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,717       37.17       37.17
          2 |      3,196       31.96       69.13
          3 |      1,683       16.83       85.96
          4 |        787        7.87       93.83
          5 |        292        2.92       96.75
          6 |        158        1.58       98.33
          7 |         70        0.70       99.03
          8 |         38        0.38       99.41
          9 |         19        0.19       99.60
         10 |         11        0.11       99.71
         11 |          5        0.05       99.76
         12 |          4        0.04       99.80
         13 |          1        0.01       99.81
         14 |          3        0.03       99.84
         17 |          1        0.01       99.85
         18 |          1        0.01       99.86
         99 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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