Frequencies for first 10,000 rows of repeac variable in natlterr1995 dataset :

     Repeat |
  C-section |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,041       10.41       10.41
          2 |      8,958       89.58       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015