Frequencies for first 10,000 rows of uld_breech variable in natl2012 dataset :

 Breech RFP |
721=f_uld_b |
  reech U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        218        2.18        2.18
          2 |      7,341       73.41       75.59
          9 |      2,441       24.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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