Frequencies for first 10,000 rows of induct variable in natlterr1997 dataset :

  Induction |
   of labor |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        587        5.87        5.87
          2 |      9,413       94.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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