Frequencies for first 10,000 rows of dtotord variable in natl1988 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,783       37.83       37.83
          2 |      3,126       31.26       69.09
          3 |      1,708       17.08       86.17
          4 |        803        8.03       94.20
          5 |        306        3.06       97.26
          6 |        154        1.54       98.80
          7 |         58        0.58       99.38
          8 |         24        0.24       99.62
          9 |         15        0.15       99.77
         10 |          7        0.07       99.84
         11 |          4        0.04       99.88
         13 |          1        0.01       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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