Frequencies for first 10,000 rows of breech variable in natl1995 dataset :

Breech/Malp |
resentation |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        373        3.73        3.73
          2 |      9,596       95.96       99.69
          9 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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