Frequencies for first 10,000 rows of uop_induc variable in natl2015 dataset :

  Induction |
 of Labor 1 |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,542       25.42       25.42
          2 |      7,395       73.95       99.37
          9 |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016