Frequencies for first 10,000 rows of ld_indl variable in natlterr2012 dataset :

  Induction |
   of Labor |
        RFP |
608=f_ld_in |
     duct R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      7,938       79.38       91.01
          U |        349        3.49       94.50
          Y |        550        5.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016