Frequencies for first 10,000 rows of ld_indl variable in natlterr2007 dataset :

  Induction |
   of Labor |
        RFP |
608=f_ld_in |
     duct R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,163       61.63       61.63
          N |      3,517       35.17       96.80
          U |          1        0.01       96.81
          Y |        319        3.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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