Frequencies for first 10,000 rows of induct variable in natl1999 dataset :

  Induction |
   of labor |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,196       21.96       21.96
          2 |      7,804       78.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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