Frequencies for first 10,000 rows of me_trial variable in natl2013 dataset :

   Trial of |
      Labor |
  Attempted |
        RFP |
621=f_md_tr |
      ial R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      1,369       13.69       13.69
          U |        198        1.98       15.67
          X |      7,608       76.08       91.75
          Y |        825        8.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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