Frequencies for first 10,000 rows of dtotord variable in natl1990 dataset :

     Detail |
Total Birth |
      Order |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,646       36.46       36.46
          2 |      3,191       31.91       68.37
          3 |      1,765       17.65       86.02
          4 |        799        7.99       94.01
          5 |        305        3.05       97.06
          6 |        125        1.25       98.31
          7 |         67        0.67       98.98
          8 |         21        0.21       99.19
          9 |         12        0.12       99.31
         10 |          7        0.07       99.38
         11 |          8        0.08       99.46
         12 |          2        0.02       99.48
         13 |          1        0.01       99.49
         99 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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