Frequencies for first 10,000 rows of dtotord variable in natl1975 dataset :

Total birth |
      order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,294       42.94       42.94
          2 |      3,126       31.26       74.20
          3 |      1,281       12.81       87.01
          4 |        593        5.93       92.94
          5 |        266        2.66       95.60
          6 |        148        1.48       97.08
          7 |         98        0.98       98.06
          8 |         61        0.61       98.67
          9 |         30        0.30       98.97
         10 |         27        0.27       99.24
         11 |         22        0.22       99.46
         12 |         14        0.14       99.60
         13 |          8        0.08       99.68
         14 |          6        0.06       99.74
         15 |          3        0.03       99.77
         16 |          1        0.01       99.78
         99 |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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