Frequencies for first 10,000 rows of uld_breech variable in natlterr2006 dataset :

 Breech RFP |
721=f_uld_b |
  reech U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        310        3.10        3.10
          2 |      8,149       81.49       84.59
          9 |      1,541       15.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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