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

 Breech RFP |
721=f_uld_b |
  reech U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        253        2.53        2.53
          2 |      8,363       83.63       86.16
          9 |      1,384       13.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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