Frequencies for first 10,000 rows of breech variable in linkco1991us_num dataset :

Breech/Malp |
resentation |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,399       13.99       13.99
          2 |      8,394       83.94       97.93
          9 |        207        2.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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