Frequencies for first 10,000 rows of ld_indl variable in natlterr2011 dataset :

  Induction |
   of Labor |
        RFP |
608=f_ld_in |
     duct R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,536       25.36       25.36
          N |      5,905       59.05       84.41
          U |      1,092       10.92       95.33
          Y |        467        4.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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