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

    Primary |
  C-Section |
        RFP |
732=f_u_pri |
       mc U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        614        6.14        6.14
          2 |      4,092       40.92       47.06
          9 |      1,457       14.57       61.63
          . |      3,837       38.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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