Frequencies for first 10,000 rows of ld_indl variable in natlterr2010 dataset :

  Induction |
   of Labor |
        RFP |
608=f_ld_in |
     duct R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,656       46.56       46.56
          N |      4,070       40.70       87.26
          U |        849        8.49       95.75
          Y |        425        4.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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