Frequencies for first 10,000 rows of uld_breech variable in natl2011 dataset :

 Breech RFP |
721=f_uld_b |
  reech U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        206        2.06        2.06
          2 |      8,081       80.81       82.87
          9 |      1,713       17.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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