Frequencies for first 10,000 rows of ume_repec variable in natlterr2008 dataset :

     Repeat |
  C-Section |
        RFP |
733=f_u_rep |
       ec U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        554        5.54        5.54
          2 |      4,092       40.92       46.46
          9 |      1,415       14.15       60.61
          . |      3,939       39.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016