Frequencies for first 10,000 rows of uld_breech variable in natlterr2012 dataset :

 Breech RFP |
721=f_uld_b |
  reech U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        410        4.10        4.10
          2 |      5,324       53.24       57.34
          9 |      4,266       42.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016