Frequencies for first 10,000 rows of breech variable in natlterr1996 dataset :

Breech/Malp |
resentation |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        190        1.90        1.90
          2 |      9,799       97.99       99.89
          9 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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